Vehicles are registered by the dealer electronically. Their paperwork may be correct but most likely they cocked up when they registered the bike. Check the VIN is correct on the V5 too.
The large steam and gas turbines I work with also have vents on the oil filter housings, but I have never seen one on a car or bike oil filter. I guess they just don't need it as the filter holds so little oil, or air until it is filled.