Just don't think you're getting all the pictures you should be getting. One of my cameras is within sight of my kitchen window, yes I live amongst 'em. Last week I saw a doe and two bucks walk single file by the tree the camera is hung on, and out an open gate in the fence that the camera is aimed at. That gate is only 10 yards from the camera and the deer were within 5 ft of the camera when they went by the tree. Thinking I'd like to see what the bucks looked like close up, I went out and swapped out the sd card to check it out on my desk top computer. Not one picture of the three deer were on the card. Don't know why it happens but this isn't the first time I've seen it . This time it was on a Moultrie, the other a nice Browning camera.
