wow, i dont believe that your salesperson lied that obviously to you
it has nothing to do with the transmission you ordered
what he showed you was the order transmission to BMW. he has no confirmation because he has no production allocations, he basically sold you a car that isnt going to be built anytime soon.
dealers do this to take you out of the market, then string you along with lies. he's basically playing you for a fool. he probably didnt realize that the screenshot he sent you had the wrong date on it.
Past: 2001 Orientblue E46 330i
Past: 2004 S60R 6MT
Past: 2007 E90 335i 6MT
Past: 2010 335xi ZMP, BMW Performance Kit, BMW Performance Exhaust
Present: 2013 335i 6MT ZMM/ZDH/ZTP/3AG/494/508