I'm on PC. It wasn't a control error. Actually, I never steal from friendly places. Only, from neutral or enemy sites. But even there, one gets usually a warning and an option to get out. Here the items were colored white, so it wasn't even stealing. I suppose it's a bug that this was considered stealing. But what pains me most is that Tulla, Wulbren and Barkus... all of whose lives are saved, attack without question. This was a very immersive-breaking, story-wrecking event for me. Well, I got to loot a runepower bomb after they were all dead.