Not to worry,,, It's October.. There are a lot of theories as to why and a few who claim to hold the key to the mystery, but alas no one has been able to unlock the box with any regularity..
From about Oct 5 to 25, deer just plain and simple are in some form of transition stage, between summer feeding and rut. Research it any way you want, but deer sightings and hunting opportunities are about 10% of what they will be in a couple of weeks.
Best advise I can give you is be very careful and hunt near good bedding cover. If you have oaks in your area, check them out, the acorns are a preferred food source when and where available this time of year.