Interesting, thanks for the info. How long ago did you purchase that drive and was it a "Backup Plus" or "Expansion" model? Are you in the United States?
You have an anomaly of a drive. It's fascinating to me that Seagate has chosen to resurrect the CC44 firmware in the DM000 drives when this firmware was last seen shipped in 2012, and isn't even listed as a possible firmware for 1TB/platter drives.
http://knowledge.seagate.com/articles/en_US/FAQ/223651en
Although after reviewing your screen shots, I have done some research and do in fact see ST5000DM000 drives in the wild. This firmware is shuck-able, so anybody getting a drive with this firmware is good to go.
As I said, I still can't wrap my head around Seagate using a firmware from the Barracuda 7200.13 SATA2 generation drive in the 7200.15, but your screen shots prove otherwise.
This is a 5900RPM firmware, so it's possible, but the sector map had to be revised for the 1TB platters since this is a carryover from the 600GB/platter generation. Seagate may eventually ship a ST5000DX000 (5TB) or ST6000DX000 (6TB) 7200RPM drives with the CC46 firmware in the Expansion USB product (which often goes on sale for around half the price of the internal equivalent.) These drives have been seen in the Backup Plus product in other markets. The problem is the Backup Plus line doesn't go on sale as aggressively as the Expansion line (which has seen drives selling for half the price of the internal models)
You can flash the CC46 firmware to the CC41 drives, but providing that information got me in legal trouble. The only difference between these firmware is to enable/disable different features within the drive. Seagate only manufactures two physical 1TB/platter drives, one has a 5980RPM motor, one has a 7200RPM motor. Cache, power management and performance metrics are all controlled by the firmware.