Premiere Pro CS4 60fps with video effect creating problems.

Hey guys, got a problem in PPro CS4.

I'll go step by step as to the problem.

Using a 550D, I shot 720@60fps and in CS4 (in a custom 1280x720 23.976 sequence) I interpreted this footage to 23.976.

I had the whole film cut when I did the color correction using MB Looks and as well I added a 35mm grain clip and overlaid.

Once I did this, I rendered the sequence but as I played back the render I saw that each clip had changed it's in and out points randomly making the whole film useless. It all seems to be due to the adding of the video effects, but I can't figure out how to prevent this from happening.

Any idea as to how I can solve this?

Cheers.