i had the same problem last year late seaon, it is just the way your bucks in your area are patterning right now. If you have lots of does now make sure they stay right where they are at, when late October rolls around and the rut start coming into swing I would be in that stand all day, bucks will be where the does are, I know it is frustrating and upsetting to not have bucks but if you have deer coming in now, just keep feeding them or whatever you are doing and keep the pressure in the area zero to none and they will come.