Need some advice :)

New to rekordbox. Testing it out with an xdjrx2.

When in midi mode it works great. No latency issues however sometimes the lines do not align together on the controller eventthough there is a perfect beat match.

My other quesry is: when in midi mode and then selecting a song from usb the sync does not seem to be doing it s work. Song remain unmatched.

I guess this is coming from some settings that I got.

Any help will be greatly appreciated.

Thanks in advance.