Reply to Traktor 2: Tracks are jumping around

I've been trying to build the confidence to use Traktor 2 in my weekly sets, and began to go through today and update playlists and what not within the software. Upon working with some mixes, I began to notice that loaded tracks were randomly jumping/stuttering in small increments without trigger. I checked my latency, turned off wi-fi and bluetooth, no FX were toggled....it's baffling. Is this a known issue? Are there fixes or triggers to the problem?

Traktor 2
Macbook Pro 2.8Ghz Core Duo
4GB Ram
Kontrol S4