When I search for , whether it's from the Shop Search page, Account Search to Shop Search, or the Shop Search link from the item blurb, if I click on one of the shops that has it in stock it takes me to my shop stats page rather than the user shop containing the item. This is the only item that I've had this issues with. I tried a random item, as well as another item from my wishlist just in case that was the problem.
I believe those are legacy shops, shops still on the old system that where filtered out of the site. So it's not the item itself causing the problem, it's just that it's only being sold in two very old shops. I don't know if it's a bug since they intentionally redirected links to older shops to your own shop page quite a while ago.