RE: Why is this?
Your problem may not be as bad as you think. Maybe you just aren't seeing the bucks at this time of year.
3 years ago I thought we were starting to have the same problem up here, and it didn't make sense. For about 2 weeks in early/mid October I hunted nearly all day every day. Many of those days I would see 15 does to every buck. I thought, how can this be when I KNOW the buck to doe ratio is nearly 1:2.....It was all in the time of year. Once the end of October rolled around I was seeing 10-15 deer a day and about 40% of them were bucks.
Just my situation and observations.