Britishisms
The use of the terms "ring" meaning "make a phone call" and "post" meaning "send through the mail" really stuck out like a sore thumb. Initially I thought it was a Canadian production and wasn't sure if those terms were used in Canada but then I researched and found out that everyone involved with the production is American.
My only conclusion is that either the characters or the writers are pretentious anglophiles and, either way, it's annoying. Or I guess maybe it could have been produced to target a British audience but it wouldn't make any sense.
Maybe the writers(or characters)have watched too much Doctor Who.