There are a lot of glitches with links to stores at the moment, it seems. It makes me wonder if eBay are actively working to de-individualise stores, which suits the collated listing style they're currently implementing (hence also shoving other seller's listings in stores, and in search results from the all items view with a particular seller). I haven't tested it in the last few days, but all last week if I clicked on my own door, I'd just get taken to a page that said my store didn't exist. 
