This causes problems mainly in games with WASD running, when I´m for example running using the joystick, then press  (11 key ) it should switch to weapon 1 then secondary  function ADS.  The secondary function stops working (so my character just switches weapons). Secondary function works perfect if I'm not using the joystick or WASD keys at the same time. It will work sometimes but its extremely unreliable and if it does work its only a fraction of the time.

I tested it in notepad and the secondary  function works 100% of the time until i use the joystick and it overrides the keys pressed. it's like the Tartarus pro can only accept one command at a time. Like the old school keyboards with ghosting issue if you pressed to many keys at once.

Does anyone have an idea what to do with this and what might be causing it?