And tick "Improved Pathfinding" in BGconfig.EXE. It recalculates the path every few seconds. While they still start to wander off, they turn around shorty after to get back on course. (A minor help)
It has not often bothered me though. I've always preferred moving them in smaller groups anyway, using the 7,8,9,0,- keys to select. Or using the follow-the-leader formation where they move out one at a time.
Post edited November 08, 2012 by anamorphic