If that was a printed sign, though, then presumably there's no reason whatever system bug caused that drivel to be sent to the printer might not cause exactly the same drivel to be sent an electronic price label?

True (and thus my use of "hopefully". But at least they could correct every store at once. Although it would probably take longer from someone noticing it to it being fixed.

I do take your point about the cases.

I am starting to believe that many shop assitants walk around in a daze - it's the only reason I can think of that our local B & Q had a sign up which misspelled the name of the town we are in in approximately 1ft high lettering.

Hahahaha shop assistants can't even control the number of tenners they can keep in the till at once, never mind what the sign on the shop says. As if. That's like blaming a nurse for the ward you're visiting being on an inconveniently high floor when the lift is broken. The stupidity is in a higher class than that.