Heads up for LRG overcharging tax.

I was charged a 1% Allegheny County Tax (that's Pittsburgh for those not from around here).
Both Pittsburgh and Philadelphia (2%) have additional sales tax - obviously only for residents of those cities/counties.
I don't live in either, so LRG wrongly charged my orders an extra 1%
The extra $5 or so isn't a huge deal, not that I appreciate them taking extra money from me, mainly I wonder how many other people are being charged extra taxes improperly.