Last week Iplayed my first gig using my Rane SL2 connected to CDJ 2000 Nexus and a DJM 900 Nexus. While playing I would find that only some tunes, of both decks randomly would seem to 'slip' or be out of time even though sera to said they were both in the same time. This does not normally happen when i play with my DDJ SX, so I don't think there are any problems with my music.

I also don't think it was the CDJs either, because the DJ after me had no problems what so ever. So what is it? Is it a setting in my serato dj? Will it happen again?