I am trying to setup a Multiplex Fun Cub with a Spketrum DX6i TX and a Spektrum AR6210 receiver.. Everything works as it should when connected to the receiver except for flaps. There are only 2 ports available to use. The gear port and the Auxillary port. I have tried connecting the flaps servos to both ports . If connected to the gear port the flaps work but they work seperately like ailerons, one up and one down. Connected to the auxillary port the flaps don't work at all. Also the Fun Cub want stay bound to the receiver. I am having to leave the bind plug in all the time. Does anyone have any suggestions how I can fix these two issues?

Thanks