i would take a guess you have the cables mixed m8. to confirm both dishes are working o.k.
you know the 28.2 is fine. so disconnect the cable that goes from disecq to reciever. then
connect it directly to the hotbird dish. you should now have one cable to one tuner with sky
down it. and one to the other tuner with 13.0 down it. do a quick scan on both to check that
they are both working correctly. assuming they are both o.k. this will also confirm which cable
is what. then back to the disecq to reconnect as before. now i know this seems long winded.
but. because you cant visually trace your cables, this will allow you to both confirm what cables
go where. and that both sats are working correctly. now recheck the configs on the tuner to
ensure they match your hardware. if alls well everything should be o.k.
simples!