I can't split the modem leg...
Here is the scoup on what happened. I had (1) Cat-5e and (1) coax ran to every room in my house, and a couple more in other places as well.
Eventhough every room is wired, we only planned on running (3) total TV's. Upstairs bonus room, downstairs family room, and master bed.
When the cable tech was here, he confirmed that the one coax run to my master bedroom is toast. Either the cable was bad, or it broke when they pulled/routed it. (Yes, I've complained already about them not testing conductivity prior to hanging drywall and enclosing everything, but either way it's too late). I don't want them to run a new cable on the outside of my house.
The downstairs family room coax/Cat5 outlet is litterally just on the other side of the wall from my master bedroom. 6" apart, back to back.
Since the original master bed coax is toast, I was simply just going to split the family room line, right there in the wall. One leg to the family room, the other leg through the wall, through the back of the master bed outlet box, and into the socket.
TV in both rooms, no need for a new cable run.
So that's the scoup.
Sam: I may have quoted the tech wrong, but he did say it was a good thing that I had (2) cables from my panel, to the outside of my house. He said something along the lines of it would be better since he wouldn't have to split one line to feed my TV splitter, and my modem.