It seems like the G51 command in your Fusion360 WCS probing post-processor isn't updating offsets as expected. Ensure that your post-processor version 2.34 fully supports the G51 command without the additional G51.X features. Double-check the syntax of your G51 command (G51 X-13.197 Y-10.91 Z-17 I0 J0 K0 H3 O2) to confirm that parameters like H3 and O2 are correctly formatted and appropriate for your setup. Verify the functionality of the probe operation itself to ensure it's configured correctly and accurately registering hits at the expected coordinates. Review the Fusion360 post-processor settings to see if there are any customizations or configurations that could affect how the G51 command is processed. Testing the command in a controlled environment and using Fusion360's debugging tools can help diagnose and resolve any issues with offset updating during probing operations.