When I hit O, only toon A targets toon E, all others bring up a chanel Roster window.
..hm, only thing which comes in mind, is the question if you also unbound all combinations of 'O' of at your toons?
-im asking, cause you said, that the chanel Roster poped up on your 'slaves', which shouldn't happen.
To try if your bindings work in general you could bind a simple '/say I'm responding' to O, to see, if all your toons get the keypress...