I’m not sure how long this has been a feature, but I got badly burned by it today and eBay’s suggested workaround was clumsy and unhelpful.
Specifically, the “Excluded Locations” checklist consists entirely of physical locations except for “Additional Locations” with “PO Box” inside it. Maybe I’ve just been lucky in not getting any bids until today from people who use PO Boxes, but I basically only ship domestically in the US, so I just have everything in “Excluded locations” checked except the “US” entry. The rest were checked because, hey, it looked from the list very much as thought it was physical locations I was excluding.
Then somebody who uses a post office box wins an auction, and is told they can’t pay, and if I look in the exclusion list, there between Cameroon and South America, is “PO Box”.
One of these things is not like the other. Maybe restructure the checkboxes so that there’s a branch for physical locations, and “Additional locations” is another. Heck, make “Additional locations” appear red and flash on and off, just do something to make it clear that this is a different sort of excluded location, please.