This is super common though. I mix up my kids’ names on a daily basis, it’s not because I don’t know who they are or can’t tell them apart. They do think it’s hilarious when I mix them up with the chickens.
The common factor is that I am usually saying the same mindless stuff to my kids (and chickens), like “get down from there” or “move out of the way please” or “stop making so much noise”.
Not defending this particular wool shop but often those sorts of specialty shops also have an online side. Weird that they would throw customers out though