LOL! I actually have most keys set to do-not-pass (dnp) cause I am constantly using guild chat, party, etc... and I found it to be annoying... anyways... back to the topic at hand. I am also running a lock/mage team and have WASD as dnp and I use num 8, 4, 6 and 2 to make both toons turn on the spot or run backwards etc. (which breaks follow). I have never had a problem with wanding breaking follow, but I will check that out...

Another problem I noticed playing another team (Warr/Priest), is when trying to use shift/alt/ctrl and the numbers, that a lot of the alt and ctrl are also bound, so check the key binding in the menu

Hope this helps