Dear Geist,
Why oh why do we Canadians spell
? Are we being Canadianly polite, throwing bones to both the British and the American lexicographers?

Dear Seeking,
Both
is by far the preferred spelling. The shortened version of that and other English words—humor, parlor, behavior, paycheck and maneuver, to name just a few—come from American lexicographers' painstaking work to distinguish American English from other varieties.
—The Editors