Yeah, figures that right after that I had the same thing happen to me in a mix. I have this song that was a mashup between two songs with completely different beats. Whoever produced it was using an effect to jump between the two. I was certain I had removed it from my playlist for Sunday but obviously I was wrong. Since the song starts “DJ friendly” I was able to cue it up and play it. Then I realized I was in a big mess. The beat was all over the place, the next song of course would never fall in sync automagically since what VDJ was reporting was not what was actually coming out of my monitors, and I had to go low tech in a hurry: beatmatch by ear, ride the pitch back and forth, and stay calm. I failed on the third one.
Because if I was calm and thinking clearly what I SHOULD have done is find the “good part” of the song, loop it, and beatmatch to it. Instead I panicked and was trying to beatmatch to a song that was going from a 136 BPM progressive beat to a 120 BPM dubstep every 8 seconds or so.
Live and learn!