
I got the same issue with the 400's, when I got my tracks beatmatched together in perfect sync they intend to jump BPM one or the other so it throws off your mix thats why you either have to always fwd or rewind it to stay in sync not too much as you well already may know, but yea I wouldnt worry about it. And it does this either via flash drive or cd's. Just make sure your MT is set to 6 (dont widen it) both IF your mixing two songs with the same BPM otherwise, experiment and master them 350's. They are solid bro.