Whenever I click someone's shop to view it from their profile, it just redirects it to a list of my own shops.

[edit]Is it because they might be an old shop?

try mine, mine are all new shops. it's likely because those are legacy shops, but if you come across it again maybe write the username or comment them and ask if it's an old shop

[edit] all of your shops work for me!

all of yours work for me, so I suppose it's safe to assume that the shops I can't view are old shops. Thank you for the help!