They sent two DVD's out to me today, and their positions on my list were nos. 4 and 6.
I can't watch Wrath of Khan before I see the last six episodes of The Original Series (they sent Star Trek: The Motion Picture WAYY out of order over a week ago, so I said screw it and watched it) (and P.S. I totally loved it, it is my new favorite movie ever, and I ordered it on Amazon yesterday), and I sure as HELL can't watch the first few episodes of I, Claudius until I get the Star Trek out of the way.
It's just frustrating, you know? The availability for all of these disks is listed as "Now," of course.