My questions are:
I use a satellite dish for the Dish network and can never get the wiring to work for it I have to run the cable through the window and into the dish box to get it to work.
What if anything am I doing wrong?
The cable from the outside runs to the inside jack with the power amplified button on it. You have a couple of choices to get this to work both of them will require modifications to how that jack is wired. Jayco's have an A/B plate which you can add as well. If you're interested in doing this, I can elaborate more but the modification will look something like this:
How can I get this to work if I put in a second TV in our bedroom? Do I need another Dish box?
If you want to view a separate channel, yes. If you want to view the same channel AND have an RF output on your satellite receiver, the modification I alluded to above can help distribute the signal to the remainder of the RV
Now if the campground has cable I hook up from campground post to the side of my RV and I can get a signal inside the RV.
Under this connection would the 2nd TV in our bedroom work without any issues?
Not sure I understand this question, but using the above idea, you can use cable OR satellite. To use both the satellite must have a separate cable run.
Since it is a single receiver box you can't watch one program and simultaneously record another for the same time slot.
You can watch one program and record another if you are watching a recording OR you have the over the air module and are watching an OTA channel.
But you are correct, you can not watch one LIVE Satellite show while recording a separate Satellite channel.