you shouldn'y have robbing now. Its probably cleansing and orientation flights for sure. They've been cooped up for a while and when they get the chance, party time! I had it on the one warmer day last week. As the sun hit a hive, about 40 minutes of activity, when the sun got blocked by a tree, back inside. If a hive died out, they would steal the left over stores, but they dont circle around a hive entrance. Robbing is intense and you can feel the anger in the air. They just attck the landing board area, but dont circle.