Make sure AE and Mocha is up to date. There were bugs. You shouldn't see position changes with you copy and paste corner pin data. Only the corner pin should have keyframes, position scale and rotation should be fixed. Try turning off the transformation keyframes and resetting all of the values.
If resetting position, scale and rotation doesn't fix the problem then check frame rates.
Also, try replacing your surface with something like the 8 X 8 grid. I find it easier to figure out if the tracking is perfect.
I thought the same thing about the position/scale/rotation data, but when I reset them, it just prevents the white solid from tracking/scaling with the clip.
And when I retrack it in Mocha and export corner pin (motion blur), it pastes with position/scale/rotation data.
Frames rates are all 29.97 non drop. I'll check for updates now since this is a company computer.
Sometimes you just misread something.
Double-checked the frame rates and the actual clip was filmed at 23.976 fps not 29.9. Updated the comp to match the 23.976 and now the tracking works!
Thanks for helping, Rick!