Papaya Pete wrote: The helper guards are flagged sentinel, but you can force sentinel mobs to move if I remember correctly.  It just keeps them from wandering around randomly.
I think you might be right.  I went over a script I had for one mob flagged as SENTINEL on my local copy of tba and it works fine.  Walks out of the room and everything.  I didn't use %at% in any way in that script or the script that fires the mobs trigger though.