They are famous (or should that be infamous?) for this and there is a lot of complaint around the motoring forums re the AA and this system.
Add to that that they are renewing membership at huge increases for exisiting members whilst offering new sign ups at greatly reduced fees ............
( Personally I wouldn't touch them for any serice at all.)
I always look for DD/SO/PayPal payments as I have full control, I got caught once , long ago with a company that carried on taking charges for an expired contract and went through ther hoops trying to stop the money going out.