Check out the "Trail Cam Tips and Tricks" article on the "How-To" page. Since you're getting a bunch of butt shots it sounds like you have a very small window for the deer to wake up the camera to take the picture. Try placing the camera parallel to the trail instead of perpendicular, giving the animal more time in front of the camera to wake it up. I've found it very beneficial to elevate my cameras as high as 8 feet and aim them down towards the trail... contrary to most recommendations to place them about 4 feet off the ground. It's a personal preference as I think it gives the camera plenty of time to "wake up" and gets me decent pics of what I want to see... antlers.
"Eyeball" night shots of distant animals and washed out close ups are part of the nature of these cameras. Most of the time you really can't avoid it, I've had those problems with ALL my cameras. If you're seeing a spot where all you're getting are eyes then you should move your camera closer to the area that the deer are moving to/thru... if that's possible.
It took me 3 years before I even got a picture of a buck... it's a learning process but it's fun (I learn more slowly than most).
“The consequences of our actions are always so complicated, so diverse, that predicting the future is a very difficult business indeed.”