While exploring some back corners of the map, my enormous stack came across multiple armies of bandits piled up on the same camp.  I spent both of my 2 movement points to eliminate two of them using autoresolve from the strategic map; after I eliminated the second one, my stack moved onto the bandit camp without my having ordered it to do so.  This did not clear the camp, and there were still bandits left: my stack was occupying the same square as the bandit camp and an army of bandits.  I had to move to a different square and then move back to fight the last bandit army and clear the camp.