Hey all, how goes?

In Maya 2009 Unlimited I've built my polygon biped character, given him joints and orientated them all, given him IK handles and now am merely trying to make a couple of foot controllers. I have got one working normally for the character's left foot, but I can't seem to get the right foot controller to stop shifting the leg position every time I hit the Point or Orient constrain menu. Seems like even if I freeze the transformations on the controller it still sends the leg shooting over somewhere. I've tried adding negative values to those which the leg moves to the controller, but it isn't really ideal and the motion seems to be juddery when I do that. Why would it work on one side of the Z axis and not the other? Has anyone come across this before?

Best respects, Stretch.