[CA] Bridging AIS from eS series to NMEA183

I have just installed 2 eS series MFDs. I have the one on my fly bridge interfaced to a AIS transceiver via NMEA183. The fly bridge MFD is interfaced to the lower station MFD with both SeatalkNG and SeatalkHS networks. I get AIS Bridged to the Lower helm station eS series MFD. I have the lower station eS series MFD interfaced to a PC. I get Depth, Heading, Speed, GPS and other information passed on to the PC but not the AIS.

Am I doing something wrong?

Would using a NMEA200 connection between the AIS and the upper station eS series MFD help get AIS to the PC?

Also, in the past I have been able to keep a library of routes on my PC and transfer them to RL80C. I can't find any provisions to transfer routes from my PC to the new eS127.

Is using SD cards to transfer routes the only option I have?

Thanks
Shay