Ok, a different problem.
Apparently, removing the medic lua script from one particular unit (it was originally going to heal others) is causing it to not move on it's own when set to patrol.
Also strangely enough, ducking the unit then switching control away from it causes it to move briefly before stopping again, as in, looking about and moving until it's back on it's feet. Then it stops.
I really don't know. There isn't anything left in the ini referencing the medic script, and everything else is almost exactly word for word to other (working) unit ini's.