The owner of the "Thirsty Saint Cornerclub" (great name btw.), in Almas Thirr wears a shirt that is typically only worn by members of the Morag Tong. As it's another vanilla asset that has not it's faction-relation stated in it's name, just like the red Morag Tong robe and the blue Temple robe, this kind of error is easy to oversee, but may "bug" a person well versed in the lore who looks for details like this. Minor bug, but it would be cool to have exteriors and interior modders now a bout those particular items, so they can avoid them just like the style mixing in the future.

Edit: Actually there are some more people walking around Almas Thirr with this shirt, so somebody should really look into the NPC's of that place.