Inbetweens wierd when using Transform

While using Toon Boom, I set 2 Motion Keyframes on an exposed image for several frame because I wanted to rotate the image. I activated Transform and Animate. Even though my 2 Key Frames are in the position I want, the path between them is wonky (not a simple rotate). I did not attempt to ease, and I already restarted Toon Boom. What is wrong?

Can you provide screen captures of the Timeline, keyframe content, drawings?