Just show your FFP card/number at check-in (or enter it when you do OLCI). There is no reason to waste time on this now.

"Susanmrs" Smith is not a (spelling)mistake - depending on the system this is the way your details appear in the reservation. There is nothing to correct. When you boarding pass is printed it will look like Smith/Susan Mrs. Most likely 50% of all bookings are made like this.