"I think I found the answer to my question. Since I added a gallon of 2:1 syrup recently it is probably more moist in the hive. The air is full of humidity today. The outside entrance in the inner cover was covered over by the top cover. I just tipped the top cover up in back to expose the small hole in the inner cover and let more ventilation through." marion, did you have an additional box on top that you removed to place the 2:1 syrup on top?
the outside entrance of the inner cover, it's about one inch? if covered by the outer cover, it's closed as you figured out. you did great by tipping the outer cover back to give more ventilation, but as riverrat said, it may or may not stop the bearding, and as he said, a strong hive will beard.
my inner covers, i have notched them all out to 3 inches and use them year round, and i do, or will tip the outer cover back as well.
bearding is a natural occurrence and for many reasons, hive hot/humid/congested/ just hanging out on the front porch where it's cooler.
ps, nice picture of bearding behavior.....