hmm. hadn't thought of the horizons. I suppose I can just fix it in editing, and a slight crop! =)
#4 was a matter of scope, I suppose. I was at minumum focal length, and didn't want to back up any, so I sacrificed the top of the one tree. Also, it was quite windy, so the DOF effect is magnified by the motion of the trees (minimally, since this was a fast shutter, but still there! lol)
I guess I wasn't thinking much of DOF while shooting. I was more worried about proper exposure, and I wanted the fastest shutter I could manage because of the wind, and moving animals. I also didn't want the water to smooth out at all, I wanted ALL the ripples. Fastest shutter, obviously, points to a wider aperture, and less DOF. oh well! I'll try differently next time.