The OEM mats that came with my car has an ///M3 logo and not just a plain ///M logo. My dealer includes it with all their deliveries even though BMW technically doesn't include it in the car. It has velcro fasteners for the driver's side and stays in place no problem. Perhaps your dealer forgot to install the velcro fastener? It's a fastener that screws/snaps into a hole on the floor carpet, and there are two of them for the driver's side.
2008 ///M3 Coupe, AW/FR ext, M-DCT (gone)