Yes this sounds strange, even more so its strange that iphones work since apple devices have the worst WiFi protocols ever, that's why for a long time all apple devices were banned from schools, cause they would crash the network usually cause they never release the info they are given
Plus like someone else said being able to connect your phone to the stores sales system sounds shady lol
Only other thing I could ever guess besides what other have mentioned would be Maybe Possibly if the sales system runs off something java based adb over bridge maybe trying to connect to the system, but I'm no expert so that's literally I shot in the dark quess lol and I'd have no idea how the system would be set to connect to the phone since that usually requires setup and shortcuts to be created