All keystrokes issue

Hey!
I am coming across an issue where every keystroke going to my other instances ends up opening bags/spell book/some other random buttom along with using the correct keystroke. For example, if I hit 1 on my main, my other character will also hit 1 but seems to be triggering B and N or other variations. If I just toggle click 1 it will toggle open my bags. If I hold it, it will hold my bags open until I release. Hope this makes sense cause it's confusing me as to why it is happening and how to fix.

You don't mention which software solution you're using (and there are several), but I'll just assume ISBoxer.

If I'm guessing correctly, then it will help to see your profile.