[OPEN] XDJ-R1... effects bleed through on left deck only, right deck is fine!

i have recently purchased an xdj-r1, the problem i have is when i press the 'filter' effect for example an have the colour knobs set to 0 (no effect) on both decks the filter effect will bleed through on the left deck! Right deck is working fine. i have tried the update an that didnt resolve the problem, just wondered if anyone can help me, thanks