Rare Spelling Error in AP Piece!

It's not everyday you see one of these:

Most species are not considered aggressive toward humans, and attacks are extremely rare. But males fight each other for mates, rearing up on their tails to scratch at the soft belly flesh of their rivals with the powerful legs they more commenly use for their trademark leaps.

Commenly? Commenly? Come on. I could understand an omission of the -ly or even "comment," but this is ridiculous. "Commenly" isn't even a word - don't they have spellcheckers? I'm not annoyed, just mildly amused - I'm very surprised that one of these got by. Read the piece here.