[Bob Williams]

Are you logging into eBay's home page or some sub-site? The URL you posted goes to eBay Motors. When I tried copying and pasting it, I was asked for my login, I entered it and submitted, and then I got an eBay Motors page with a simple "Unable to redirect" message where I'd expect to see the main content area. (That is, it was an eBay-generated page with an error message, not an OW-generated, which is what you're getting.

What happens when you just go to eBay's home page and click the sign-in link?