You've been having those cold temperatures lately in February? Here in the last cold snap? I was talking with my friend in Jax and he said he, "Was huggin' the heater." So I can guess you all had some reasonably cool weather.
On the first day of that snap I had the landing board covered with very light colored bees, indicative they were very young, and with their hair all scrunched up like they were just out of the cells. I can't say why that may have happened, but usually what occurs is the cold causes everyone to snuggle next to each other to share body warmth, and the cells left outside the cluster get too cold and they freeze.
Also the bees will get old and die from the cluster and fall to the bottom board. They usually clean them out, but they build up if they're reluctant to break from the cluster.