I can't see anything on that video to help me -- just seeing waveforms doesn't tell me anything about the deck status, nor can I see what you're doing with the loop buttons / jog. Initially this seems like a misunderstanding of the sync / quantize functions, but without being able to see more, I can't be 100% certain.
As for the forums, please log out, clear your browser cache and remove any cookies for:
- *.pioneerdj.com
- *.zendesk.com
- *.gigya.com
That resolves the issues for most users.