Oh, I did know what the problem was – my ISP didn’t allow multiple active connections; I judt couldn’t figure out how to fix it.
I eventually backed into the idea of accessing an individual post, which I was able to do. From that page, I was then able to click the link for admin on my right bar and log out of IE.
Then I repeated that step in Firefox. Once I successfully was able to even access the admin page in both locations and able to log out, then it straightened itself out.
Here’s a link to the specifics in case this happens to anyone else.