Does anyone else get random situations where a classic tween doesn't work properly? Like it slides a symbol up on the stage when it should only be rotating?
I have one symbol tweening between frames 1, 5, and 9. The motion between 1 and 5 looks great but from 5 to 9 it decides to go off course to where it has to "snap" to frame 9 from 8.
Did the registration/anchor point change in frame 9? Keyframes with inconsistently positioned registration points can cause issues like that.
To move the anchor point, use the transform tool to select your symbol; then click and drag the white circle... it should snap to center & edges. Make sure it's in the same place on all frames.