Not taking sides here, but how is the store supposed to know about that?
I can't be bothered to go back and forth through the minutiae of this thread but the main thrust of it seems to be the a person with a very great deal of money available was ignored by staff. Yes, it's inattentive and sloppy, and seems it happened three times in a row which suggests it wasn't just someone having a bad morning. If every experience, good or bad, with WF could be posted on a sticky or something, so a more rounded picture can be painted of how they operate, then I'm sure that would be useful.
I have visited Royal Exchange once, though not that shop (I'm not sure it was even there at the time). But the other places were pretty busy. I'm not sure there is any expectation that anyone would automagically know learningfly's real name, unless he announced it grandiosely whilst walking through the door!