US Postal Services?

Anyone take notice of the ad occasionally appearing on this web site for Office Depot? They use the term "US Postal Services" (in plural). I've never heard of such a reference, even though Office Depot uses a (R) (registered trademark) notation following the term.

Is this just a simple typographical error? If so, they picked the wrong forum to advertise on if they expected it to get unnoticed by us collectors!

Well, the coil of the "stickers" (self adhesives) put me off and in a negative mood to begin with.
I wish someone would start a crusade against the blasted things! Not onlyh are they a nightmare to soak but they don't look philatelic enough to be taken seriously.