Misplaced Buckeye
No idea as I only thing I could think of would be a some type of a hormonal imbalance causing a doe to have antlers. All the bucks I and my friends have shot have had the right parts. All sheds I have found were taken for granted as coming from a buck. Rob is the scientific dude, I'll weasal out and let him answer the question.

Did the biologists give you reasons why it happened??
Rob
Cold weather or climate wouldn't be the only reason bucks are stressed and would drop early or why a southern area would mimic the north. Stress would still apply down south depending on the intensity of rut from competiton for breeding rights in areas where the buck/doe ratio is close to even. Intensity of rut from high number of does being bred by one buck in an overpopulated area with a poor buck/doe ratio. Overbrowsing due to a higher popluation then the carrying capacity of the area can handle. Drought conditions during and after the main rut. Poor plant nutrition in areas with poorer soil. Alot of these reason apply up here. Add winter to that and you will find a higher stress level year after year. They say the farther north you go the more photperiodism in noticed. I think it should be, the farther north you go winter conditions will add to the normal stress.
Tim