There are many other continuity issues that have been argued to death and don't need to be rehashed in this thread. However, since the producer says they will be resolved this season I'm sticking with my time-travel theory unless something more plausible comes along.Don't see why not being mentioned would be a canon issue. Lotta ships out there and a whole lot more Starfleet members. No way the people we've met could name check them all.