Beatmatching drift after some time

Hello guys, coming from Traktor, I just bought my DDJ-1000 and im very happy with the hardware but I found a problem that might be from the Rekordbox 6.0, but I read some posts about that in the past.

The problem is when two tracks perfectly beatmatched by ear (no sync button at all) with the same BPM (same decimal points, 125.00) DRIFTS OVER TIME automatically with no movements in the jog wheels or tempo fader. This is really frustrating that you need to manually adjust the tracks every 15 -30 seconds! That is unacceptable.

Same issue occurs using the SAME TRACK in BOTH DECKS with SAME BPM value using the 4 LOOP Function with quantize activated (to avoid a unmatched loop). They drift over time. Unbelievable why the same track drift over time!

Im really disappointed with this issue which is a BASIC function as a DJ.

Please help!!!