That's why you hear the 2nd and 3rd beeps immediately even when the pause is before the beeps in the exitFrame handler. However, I think your confusion comes about because you're testing out your concept in frame 1. For some totally unclear reason, frame 1 behaves uniquely. Continue doesn't continue in frame 1. For this reason, the only thing I ever do in frame 1 is put up a background cast member, and maybe do some setup of variables, etc.
Superstition seems to be the safest response to the unexplainable.