While it's sort of in keeping with Edmund's character, I agree that they should be moved back to Sasha's if it's not much trouble. If it is a big deal, of course, I'd rather them focus on whatever else it is they're doing and save it until the next store switcharound.
Now, the Kimonos in Liam's place I can see. He mostly sells really butch stuff for guys, and Yukatas and other samurai gear is butch. I don't know what his girls' store looks like, but it'd be kinda awkward to have Yukatas and Kimonos in different shops.
The Eastern Spire description on the Von Helson mansion says this:
"The tanning area used to be a beautiful atrium and greenhouse overlooking the southern wall of Durem. The beautiful glass though and scenic cityscape was put too much better use though as a Tanning Salon. People often report seeing the twins atop the spire, looking down upon the city. There is also rumor that Edmund chose his shop location for very "specific" reasons... "