Same here. Mine are pointed down and the bees dart in and out like B2 bombers. One reason you need an upper entrance in winter is to make sure they have adequate ventilation but also to get in and out on good days.I've been told that, for the winter, the notch forming the small entrance goes UP. This is to keep the entrance from being blocked by dead bees.
During the rest of the year, the bees should be keeping the hive well cleared out of corpses. Presuming you're keeping an eye on hive health, it should not matter which way it goes in. My bees seem to get in and out more easily with the large opening notch DOWN, and dart in on a dead run as soon as they hit the landing board.