So I just got my first tripod and ball head from Adorama (yay!) and have what I'm sure is a dumb question. I got a Bogen/Manfrotto 190XPROB and the 488RC2 ball head. Do you need to line up the degree markings on the ball head in any way? When I tighten it down on the tripod, in the "rear" position (with the two tripod legs with the padded grips) the markings are at about 105 degrees. I assume this is normal, but I'm an incredible newbie so please let me know.

