The property sounds like a keeper and if you continue to see deer like that you'll connect. A thought I have may be you are misjudging yardage. It's easy to do and 30 yards in the woods looks a lot diffrent then 30 yards in a field. I'm not positive that thisis the culprit but it could be causing some of your problems.

Keep at it and you'll make the shot. I'd suggest finding landmarks at diffrent shooting distances to help with yardage estimations.