I gave you the benefit of the doubt and assumed that they just got it backwards and had it as an 11.38 instead of an 11.83, so I thought you would've been dead-on. 3's and 7's... they look pretty similar, and they're pretty close to each other on the keypad, too.
But yeah, it's only been a rule to check your dial-in for a decade or two.
Glad you got some sticker money, though!