I see… I wasn’t aware that you had a Airbus sidestick as it wasn’t mentioned in your initial post. I assumed it was just on your Honeycomb throttle since that’s what was tagged. So I also assumed that you have a Honeycomb Yoke to match it.
The airbus sidestick got assigned with the throttle axis probably because the sidestick was reverted back to the default profile. This is actually a fairly common occurrence especially when there’s a new update that changes the default binding, or that MSFS just happen to detect the hardware as a new connection which usually asks you with a dialog box to load the default profile or customise. Choosing the Default profile would revert the whole profile to the default. And the Default profile for the TCA Airbus uses the assumption that you only have the sidestick and nothing else, so the Throttle Axis was bound to the slider, and you have to remove it.
That being said, I already made a lengthy post about understanding how MSFS treats the different input types and some golden rule for troubleshooting. It may be specific to Trim, but it applies to all functions.