Incorrect frame rate for playback

[VelociRacer]

I have a 1280x720 60fps TS file which I edit with MPEG2Cut2 or HDTV2MPEG2 then run thru AutoGK to get a 1280x720 XviD. AutoGK determines it is 24 fps FILM and completes the job. But when I play back the entire file (over 2 hours), it tries to play at 60fps so video and audio are 2x faster than normal.

If I make a smaller (3 minute) clip and let AutoGK do its thing, I get perfect 24 fps (23.976) playback. Only the full clip plays faster (60 fps using MPC).

I can post the log file is necessary, but the relevant part is that it detects 24fps FILM and it will selecteven and decimate the input file down to 24fps.

Is it as simple as using a AVI Frame Rate Changer to fix this? Or does autoGK have some limitation that I'm not aware of?

Thanks.

[VelociRacer]

Wanted to add that I am doing 2 pass, size set to 4487 (DVD-R) which comes out mid 70s in the comp test. But for the 3 minute test clip, I am using single pass, 75% quality.

Also, AVI frame rate changer did not work. The full file already contains 23.976, but when played back using Media Player Classic, it runs fast as if it was 60 fps. Any help would be great. Thanks.