diff --git a/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java b/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
index dd088695a..2334294f4 100644
--- a/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
+++ b/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
@@ -46,6 +46,7 @@
 import io.github.dsheirer.module.decode.dmr.message.DMRMessage;
 import io.github.dsheirer.module.decode.dmr.message.data.DataMessage;
 import io.github.dsheirer.module.decode.dmr.message.data.csbk.CSBKMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.UnknownCSBKMessage;
 import io.github.dsheirer.module.decode.dmr.message.data.csbk.hytera.HyteraTrafficChannelTalkerStatus;
 import io.github.dsheirer.module.decode.dmr.message.data.csbk.motorola.CapacityMaxAdvantageModeVoiceChannelUpdate;
 import io.github.dsheirer.module.decode.dmr.message.data.csbk.motorola.CapacityMaxAloha;
@@ -886,7 +887,12 @@ private void processCSBK(CSBKMessage csbk)
                 }
                 else
                 {
-                    mLog.error("Unrecognized DMR channel grant CSBK ignored: " + csbk.getClass());
+                    //Log when a CSBK that is not the Unknown CSBK is processed, to detect when new opcodes are added
+                    //that are not ChannelGrant subclass implementations.
+                    if(!(csbk instanceof UnknownCSBKMessage))
+                    {
+                        mLog.error("Unrecognized DMR channel grant CSBK ignored: " + csbk.getClass());
+                    }
                 }
                 break;
             case MOTOROLA_CAPMAX_ALOHA:
diff --git a/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/csbk/motorola/CapacityMaxAdvantageModeVoiceChannelUpdate.java b/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/csbk/motorola/CapacityMaxAdvantageModeVoiceChannelUpdate.java
index 92249ef1e..f0b10fc95 100644
--- a/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/csbk/motorola/CapacityMaxAdvantageModeVoiceChannelUpdate.java
+++ b/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/csbk/motorola/CapacityMaxAdvantageModeVoiceChannelUpdate.java
@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2023 Dennis Sheirer
+ * Copyright (C) 2014-2024 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -30,7 +30,6 @@
 import io.github.dsheirer.module.decode.dmr.message.CACH;
 import io.github.dsheirer.module.decode.dmr.message.data.SlotType;
 import io.github.dsheirer.module.decode.dmr.message.data.csbk.CSBKMessage;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -281,18 +280,19 @@ public void apply(List<TimeslotFrequency> timeslotFrequencies)
     public int[] getLogicalChannelNumbers()
     {
         //Since both timeslots share the same LCN, we use just TS1's channel for both channel 1 and channel 2
-        if(hasChannel1Timeslot1() && hasChannel2Timeslot1())
+        if((hasChannel1Timeslot1() || hasChannel1Timeslot2()) && (hasChannel2Timeslot1() || hasChannel2Timeslot2()))
         {
             return new int[]{getChannel1TS1().getChannelId(), getChannel2TS1().getChannelId()};
         }
-        else if(hasChannel1Timeslot1())
+        else if((hasChannel1Timeslot1() || hasChannel1Timeslot2()))
         {
             return new int[]{getChannel1TS1().getChannelId()};
         }
-        else if(hasChannel2Timeslot1())
+        else if((hasChannel2Timeslot1() || hasChannel2Timeslot2()))
         {
             return new int[]{getChannel2TS1().getChannelId()};
         }
+
         return getChannel1TS1().getLogicalChannelNumbers();
     }