diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
index 141725c..71c87ae 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
@@ -366,9 +366,10 @@ let sigMeasurePeak = null;
 let lastFreqHz = null;
 let centerFreqDirty = false;
 let jogUnit = loadSetting("jogUnit", 1000);   // base unit: 1, 1000, 1000000
-let jogMult = loadSetting("jogMult", 1);      // multiplier: 1, 10, 100
-let jogStep = Math.max(jogUnit * jogMult, 1);
+let jogMult = loadSetting("jogMult", 1);      // divisor: 1, 10, 100
+let jogStep = Math.max(Math.round(jogUnit / jogMult), 1);
 let minFreqStepHz = 1;
+let lastModeName = "";
 const VFO_COLORS = ["var(--accent-green)", "var(--accent-yellow)"];
 function vfoColor(idx) {
   if (idx < VFO_COLORS.length) return VFO_COLORS[idx];
@@ -1053,7 +1054,7 @@ function updateJogStepSupport(cap) {
     Number.isFinite(current) && current >= minFreqStepHz ? current : Math.max(steps[0], minFreqStepHz);
 
   jogUnit = steps.reduce((best, s) => (Math.abs(s - desired) < Math.abs(best - desired) ? s : best), steps[0]);
-  jogStep = Math.max(jogUnit * jogMult, minFreqStepHz);
+  jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
   saveSetting("jogUnit", jogUnit);
   saveSetting("jogStep", jogStep);
 
@@ -1240,7 +1241,12 @@ function render(update) {
   }
   if (update.status && update.status.mode) {
     const mode = normalizeMode(update.status.mode);
-    modeEl.value = mode ? mode.toUpperCase() : "";
+    const modeUpper = mode ? mode.toUpperCase() : "";
+    modeEl.value = modeUpper;
+    if (modeUpper === "WFM" && lastModeName !== "WFM") {
+      setJogDivisor(10);
+    }
+    lastModeName = modeUpper;
     updateWfmControls();
     // When filter panel is active (SDR backend), update the BW slider range
     // to match the new mode — but only if the server hasn't already sent a
@@ -1716,7 +1722,7 @@ const jogStepEl = document.getElementById("jog-step");
 const jogMultEl = document.getElementById("jog-mult");
 
 function applyJogStep() {
-  jogStep = Math.max(jogUnit * jogMult, minFreqStepHz);
+  jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
   saveSetting("jogUnit", jogUnit);
   saveSetting("jogMult", jogMult);
   saveSetting("jogStep", jogStep);
@@ -1724,6 +1730,17 @@ function applyJogStep() {
   refreshCenterFreqDisplay();
 }
 
+function setJogDivisor(divisor) {
+  const next = divisor === 10 || divisor === 100 ? divisor : 1;
+  jogMult = next;
+  if (jogMultEl) {
+    jogMultEl.querySelectorAll("button[data-mult]").forEach((b) => {
+      b.classList.toggle("active", parseInt(b.dataset.mult, 10) === jogMult);
+    });
+  }
+  applyJogStep();
+}
+
 async function jogFreq(direction) {
   if (lastLocked) { showHint("Locked", 1500); return; }
   if (lastFreqHz === null) return;
@@ -1835,7 +1852,7 @@ if (jogMultEl) {
       multBtns.forEach((b) => b.classList.toggle("active", b === activeMult));
     }
   }
-  jogStep = Math.max(jogUnit * jogMult, minFreqStepHz);
+  jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
 }
 
 async function applyModeFromPicker() {
@@ -1850,6 +1867,9 @@ async function applyModeFromPicker() {
   try {
     await postPath(`/set_mode?mode=${encodeURIComponent(mode)}`);
     showHint("Mode set", 1500);
+    if (mode.toUpperCase() === "WFM") {
+      setJogDivisor(10);
+    }
     // Apply sensible default bandwidth for the new mode and push to server.
     await applyBwDefaultForMode(mode, true);
   } catch (err) {
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
index 40a7553..fa976a8 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
@@ -124,11 +124,11 @@
           </div>
           <div class="freq-field mult-col">
             <div class="jog-mult" id="jog-mult">
-              <button type="button" data-mult="1" class="active">1×</button>
-              <button type="button" data-mult="10">10×</button>
-              <button type="button" data-mult="100">100×</button>
+              <button type="button" data-mult="1" class="active">1</button>
+              <button type="button" data-mult="10">1/10</button>
+              <button type="button" data-mult="100">1/100</button>
             </div>
-            <div class="label"><span>Unit Multiplier</span></div>
+            <div class="label"><span>Unit Divisor</span></div>
           </div>
         </div>
       </div>
diff --git a/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs b/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
index 75affe8..2497ee6 100644
--- a/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
+++ b/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
@@ -332,8 +332,8 @@ impl ChannelDsp {
         (decim_factor, channel_sample_rate)
     }
 
-    fn rebuild_filters(&mut self) {
-        let (_, channel_sample_rate) = Self::pipeline_rates(
+    fn rebuild_filters(&mut self, reset_wfm_decoder: bool) {
+        let (next_decim_factor, channel_sample_rate) = Self::pipeline_rates(
             &self.mode,
             self.sdr_sample_rate,
             self.audio_sample_rate,
@@ -354,13 +354,8 @@ impl ChannelDsp {
         };
         self.lpf_i = BlockFirFilter::new(cutoff_norm, self.fir_taps, IQ_BLOCK_SIZE);
         self.lpf_q = BlockFirFilter::new(cutoff_norm, self.fir_taps, IQ_BLOCK_SIZE);
-        self.decim_factor = Self::pipeline_rates(
-            &self.mode,
-            self.sdr_sample_rate,
-            self.audio_sample_rate,
-            self.audio_bandwidth_hz,
-        )
-        .0;
+        let rate_changed = self.decim_factor != next_decim_factor;
+        self.decim_factor = next_decim_factor;
         self.decim_counter = 0;
         self.resample_phase = 0.0;
         self.resample_phase_inc = if self.sdr_sample_rate == 0 {
@@ -368,16 +363,18 @@ impl ChannelDsp {
         } else {
             self.audio_sample_rate as f64 / self.sdr_sample_rate as f64
         };
-        self.wfm_decoder = if self.mode == RigMode::WFM {
-            Some(WfmStereoDecoder::new(
-                channel_sample_rate,
-                self.audio_sample_rate,
-                self.output_channels,
-                self.wfm_deemphasis_us,
-            ))
+        if self.mode == RigMode::WFM {
+            if reset_wfm_decoder || rate_changed || self.wfm_decoder.is_none() {
+                self.wfm_decoder = Some(WfmStereoDecoder::new(
+                    channel_sample_rate,
+                    self.audio_sample_rate,
+                    self.output_channels,
+                    self.wfm_deemphasis_us,
+                ));
+            }
         } else {
-            None
-        };
+            self.wfm_decoder = None;
+        }
         self.frame_buf.clear();
     }
 
@@ -466,7 +463,7 @@ impl ChannelDsp {
         self.mode = mode.clone();
         self.audio_bandwidth_hz = default_bandwidth_for_mode(mode);
         self.demodulator = Demodulator::for_mode(mode);
-        self.rebuild_filters();
+        self.rebuild_filters(true);
     }
 }
 
@@ -490,12 +487,12 @@ impl ChannelDsp {
     pub fn set_filter(&mut self, bandwidth_hz: u32, taps: usize) {
         self.audio_bandwidth_hz = bandwidth_hz;
         self.fir_taps = taps.max(1);
-        self.rebuild_filters();
+        self.rebuild_filters(false);
     }
 
     pub fn set_wfm_deemphasis(&mut self, deemphasis_us: u32) {
         self.wfm_deemphasis_us = deemphasis_us;
-        self.rebuild_filters();
+        self.rebuild_filters(true);
     }
 
     pub fn rds_data(&self) -> Option<RdsData> {