Turns out it was a incomapabilty with Autohotkey i disabled it and the problem dissapeared.

It was "2" but now insted of selecting the second slot, it now selects the last slot, which is bound to "0"

What did you do? : I was placing down powerpoles going right
What happened? : The second item in the first quickbart was consistently selected
What did you expect to happen instead? : The powerpole stayed selected in the quickbar