Instant doubles phase errors.

 Version 4.2.2 w/ performance pack, DVS

Turntables: 2 x Stanton ST.150

Mixer: Pioneer DJM900-nxs2

Subcontroller: Pioneer DDJ-SP1 

When loading an instant double via double clicking the load button on the
DDJ-SP1 the two decks are slightly out of sync.  It's not really large enough a difference to be noticeable when slamming the crossfader from one channel to the other, but in the center, with both decks playing the phase difference is very noticeable.  This is not a tremendous problem, but in Serato DJ it just works.