*EDIT* I typed this before femurat's and mh's replies
Did you buy the cylinder and that key direct from Abus or from an online shop that sells all manner of locks and parts? Some sellers just dont do a good job with descriptions or arent well versed in every nuance that a real locksmith or hardcore locksport hobbyist would immediately pick up on.
I know where femurat is coming from, the title does make it sound like Abus did this on purpose to trick you into buying a different model cylinder, it seems more like a mix up or the seller not veryfying exactly what you were expecting to get or the seller thinking that it was normal Everest check pin cylinder.
If you can share with us the link where you bought it we can see if its a mistake or intentional misleading just to sell off some old stock or something. Im inclined to edit the title as well but lets see where you bought this thing.
Thank you
Squelchtone