Try not setting that first keyframe at 0 seconds. I use 5 with the patch and with 2 keyframes (first at 2 seconds 180 degree, 2nd at 4 seconds at another 180 degrees). Just had a thought, how are you entering the rotations? Are you doing it in the object attributes or using the edit at the top of the screen? If you are entering the numbers manually that may be your problem, try using the edit up top. If I think of anything I'll post later.