Waveform bouncing

I caught a video of an issue that has occurred a few times in my using Cross.
When playing, sometimes beatmatch waveform has a bouncing motion to it and doesn't correspond to the waveform in the deck display.
See video here
https://www.dropbox.com/s/emimvtr3as60v8i/2012-09-14%2022.48.44.mov
and here
https://www.dropbox.com/s/4pxors06e5scjsn/2012-09-14%2022.50.11.mov
Using a macbook pro 13" with 8gb ram, set to use 32% of ram in settings. OSX 10.7.4. Dual 128 gb SSD's raid 0'd. No external programs running except dropbox, alfred, caffiene, and main menu (all of which are extremely low memory usage) and wifi turned off. Not recording. Using an Allen & Heath DB4 as audio interface, and a korg padKontrol for as MIDI.
When playing, sometimes beatmatch waveform has a bouncing motion to it and doesn't correspond to the waveform in the deck display.
See video here
https://www.dropbox.com/s/emimvtr3as60v8i/2012-09-14%2022.48.44.mov
and here
https://www.dropbox.com/s/4pxors06e5scjsn/2012-09-14%2022.50.11.mov
Using a macbook pro 13" with 8gb ram, set to use 32% of ram in settings. OSX 10.7.4. Dual 128 gb SSD's raid 0'd. No external programs running except dropbox, alfred, caffiene, and main menu (all of which are extremely low memory usage) and wifi turned off. Not recording. Using an Allen & Heath DB4 as audio interface, and a korg padKontrol for as MIDI.