I was having issues with Faithless - Muhammad Ali 2.0 High Contrast Remix, a funky number which I put in our new set the other day. It seems to start with a few bars perc before the track properly begins and if mixed from that initial perc start, the flow seems to easily fit in sync but appears out of cycle (if that makes sense). Had to practice a bit to get it to drop/transition in the position I wanted, which wasn't too bad as it happend to be the first mix in the recorded set, so it was easy enough to repeat without cocking up good run.