I got on live chat again early this afternoon, and left the poor rep. scratching his head. He did give me the phone number to their "Advanced Assistance" and so I called them.
1. Origin/EA is having download issues at the moment. For a few days, in fact. So if you are planning on downloading anything through them, best to wait a few days.
Since my download was in progress and I wasn't having problems with it stopping or pausing randomly, they were gracious enough to try to help me with the head scratching. After running a tracer, it appears that part of the issue may be my ISP.
2. The instructions for reinstalling the game (the one where it says to rename Sims3Setup to Sims3Setup.exe, et al.) is no longer valid. Apparently they have fixed the issue of the tags being incomplete and after installing though Origin there should no longer be a problem.
I don't know when they fixed this, though the last post I saw on the topic from the EA forums and the Sims3 site were December of last year (2012).
So, here I am, all installed and patching! YAY! Finally
Let's just hope it works when it's time to play.
(then I have to install all the other ones. ugh)
Thanks for the brainstorming and help!