Yes, eBay is tinkering, where they probably don't need to tinker. What ever happened to the good, old Yankee wisdom, "If it ain't broke, don't fix it"?
Of course, that is at odds with another great trait in the American character, to tinker with things constantly.
Anyway, when you access your "My eBay" page, doublecheck to see if you see a line of text towards the upper-right corner, that says something about trying out the "new eBay experience". You may have gotten stuck in eBay's beta demo of their new page layouts and search functions. It can happen without actively choosing it; it happened to me already, I think when I navigated past one of those messages that they often throw up at you after you log in and you are navigating to your page.
If you are in the beta demo, there should be a link to send you back to the current production version.
This was a topic a little while ago (back in July, perhaps) among a couple of us eBay users, and we all seemed to hit these changes in the searches, all unwittingly, and I think everyone agreed that the changes do not make searching easier, but more complicated. For example, my categories were no longer functioning as categories, but as searches, retrieving about five times as many records than they did before (like auctions ending in months from the present).
And there may be something other than this beta demo taking place. I noticed the other night that my categories were no longer defaulting to "Ending earliest", but to "Best match". That was something I had seen when I fell into that beta demo, but this time, I wasn't in the demo. I had to edit the preferences on my categories to restore that sort preference to be a default.
Anyway, hope this might help, and that you're able to get your bearings again in that blasted site.
Prost!
Brad