Rekordbox DDJ RB Channel Level Problem

Hi guys,

Just need a little help in regards to the Channel Levels on my DDJ-RB, when I'm trying to mix two tracks together, when I raise the channel level on Deck 2 for example the track on Deck 1 goes insanely quieter than when no track is playing on Deck 2 so I can't really play two tracks at the same time without the sound automatically going down...

Is there any way of fixing this because it just sounds like I am raising and un-raising the channel levels in my mixes and I don't like that.