The AP stylebook spells it with a single "L" so I'm sure I'm fighting a losing battle. (that's why we're called grammar Nazis and not grammar allies.)

"Sceptical" is an error, that should have been caught by now. "Cancelled" was a choice, I believe. 

Odd that the RG's Ed's would alter a choice, but not fix an error. 

Hope you have a wonderful weekend.