[tavavex]

You must be misremembering, or maybe the your social circle mixed up the two by accident, which then became established. The Canadian border agency is never called CBP, because the actual name of the agency is CBSA. CBP always refers to the US agency.

[fluidcruft]

We're on the US side so we probably don't care. Never heard it called CBSA or the US one called CBP, either.