That's an indication of one of two things. Either...
1) you've got Logic set to the wrong frame rate
2) the movie has a t/c burn that's at the wrong frame rate even though you have Logic set to the correct frame rate
Suggest checking #1 first. In fact, it sounds to me like you've got a 29.97 drop frame video but you've got Logic set to 29.97 non drop (or the other way around).