DDJ RZ - Jog wheel Problem

Hi there I have recently changed from the DDJ SX (Serato) to what I was hoping to be more competent and professional unit being the DD RZ (Rekordbox). In the short time I have had this new unit I stress my disappointment as the right hand jog wheel wont stay in beat even when both wheels/tracks are aligned perfectly. Can someone assist, is this a software issue or hardware? Also is the DDJ RZ compatible with Serato? as im currently thinking of reverting as I find it much more accurate.

Please Help!