If my scope wasnt off I would have killed 5 already...yes 4 inches high and 4 inches right at 75 yards means it wasnt me.
I have tried getting in my stand very early around 6am and also later after sun is up around 7am. I have sat all the way until 9-10 am and still see nothing.
I can't believe you missed five deer before checking your scope! I always make sure mine are zeroed before the season opens. And if I were to miss one, I would check the zero again. I have killed nine deer in the last five years. In that time I missed only one. That one was when my muzzleloader hang fired.
You are not getting in your stand early enough. When I hunt mornings, I am in my stand and prepared to shoot at least an hour before daylight. Of course I don't shoot before daylight. I use scent suppression on me, my clothes, and my boots. And I am as quiet as possible.
(Luke 11:21 KJV) When a strong man armed keepeth his palace, his goods are in peace:
(Luke 22:36 KJV) Then said he unto them, But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one.