Configure ISBoxer Like a Pro - Problem

I've followed the guide here:
http://isboxer.com/wiki/HOWTO:Config...xer_like_a_pro
And my ret pally + 4 fury warriors are all set to go.
I went over to the dummies to check that everything worked and found out I cannot switch target without removing current target on all toons first.
I target a dummy and start spamming the dps rotation button which causes all toons to run to the dummy and start hitting it. When I try switching a target with the ret pally and then keep spamming the dps rotation button, the pally switches back to the target the warriors are hitting, instead of the warriors switching to his target.

I think it has something to do with the way I set the assist on the keymaps, but I followed the guide there (and I'm pretty sure I got it right).