I hadnt ever noticed an ejection pattern with my Garand that is as percise as yours. Mine dents some of the case heads as well, not sure if it is always the last 2, but when I find my brass there are always a few that are dented. I'd say its normal. Unless your reloading I wouldnt worry about it. My guess on the change in ejection direction would be the decrease in pressure from the next round underneath due to the decrease in follower pressure...but thats just a wild guess. My garand's ejection pattern is sparatic, as long as it keeps feedin Im not worried about it. You could try shaping the Ejector, but if you dont know what your doing, you might be doing more harm than good. Taking it to a gunsmith to shape the ejector may prove to be just a waste of money