Nancy, I bought mine today at a CAA in Toronto. The CAA rep knew the exact price of a 10 day hopper without even looking at the screen.
I asked him specifically about your Niagara office and the information you were geting. I said, "you wouldn't have different policies, right?". And he replied that they absolutely could have a different policy because they are not attached to South-Central Ontario or whatever this CAA region is here.
Obviously I would still check as I was surprised by the response, even if it's bang on. Seems strange when you're hearing from many areas of the province - Kingston, London and Toronto so far, and Quebec and the Maritimes and that Niagara would choose something different.
Regardless now you have options if that is their policy!
For the curious --