Well yours may (or may not) show sat TV on all the sets. What Im finding out is "IF" they all work. Try messing with the TV inputs (TV/HDMI/ETC), also try turning them to "TV" and having the TV set on channel 3.
--Some units this does not help at all, but most do work on TV and channel 3.
(As mentioned-you will see the same channel on every set watching sat TV)
I started with nothing, and still have most of it left
2001 Jayco KIWI 23B
2003 Jeep Grand Cherokee 4.7 AWD