OK, a couple of things:
1. Are you also calibrating the camera wheel when doing the calibration (that is an important step)
2. Are you definitely taking the remote sticks all the way to the end of their travel (i.e 100% throw) in all directions. It’s actually best to push the sticks to the edge of travel and then do circles to ensure 100% throw is logged.
Also make sure you do end stop to end stop on the camera wheel.
If that doesn’t solve the issue come back and we can try a few other things.