This took me a while to figure out what was causing this, but I finally figured it out.

If you press any modifiers the a keystroke and release the modifier key before you release the main keystroke, that key will get stuck and be continually broadcast.

ie.. I use my normal keys to move my main around, and use shift key to move the entire group. If I press Shift-'W' to walk the entire group forward, and then release shift before the 'W' key, all the clones will continue to march forward.

I'm running on XP64 if that makes any difference.

I love having the "mute" and "do not pass" options. The mute works great, but the "do not pass" does not play nicely when using hotstrings. ie.. I press the "DNP" hotkey, then i type, "/use Treat Bag", but since some of those keystrokes are within my hotstring list, it messes up the clones and only the main one actually uses the treat bag.