What exact version of Photoshop are you using? Also, what exact version of AE (down to the last decimal)?
Is it possible to save different copies of your PSD, each with only one frame of your comic? That way you could be a little more organized with your assets and it would help eliminate some possible issues.
Both are CS6! The problem is that I have to have all of the frames of the comic in one PSD - the idea is that the "camera" (using keyframe positioning) would pan from one frame to the next in a fluid motion.
When I asked what version down to the last decimal, I meant it. After Effects version should start with 11, but we need the numbers after that too.
And I understand that you want to pan between them, so just put all the different PSD's you import into the same comp and pan between them.