I'd like to take a quick poll for those of you that own this keyboard.
Press any key or number and quickly follow that with the '00' button. On my keyboard when I do this it will repeat that first key that I pressed.
Example:
I will press r followed closely by '00'. That's it. Here is what happens:
r00r
If I were to speculate, I think that my keyboard is fine and the problem lies in the software. I bet when '00' is pressed it calls some sort of repeatLastKey() function and the 'r' gets put into the function somehow.