Revit :: How To Turn Off Or Control Meaningless Reference Points

When I make my rooms for a building, I want them to be a specific distance from the previous wall, say 10'. But when Revit measures the walls, it measures from the center line of the wall and not the edges. How do I correct this so it is measuring from the nearest edge so I'm not constantly having to think about how thick the wall was on each side and manually add 5 inchs or whatever it is in order to get a solid 10' room.

Also, when placing rooms, I have found that the program keeps making the reference distances from points halfway across the house. For example, if I want to make a room 10'x 10', and go to place the top wall of the room. If there is another wall across the hall or something that may intersect if you extend an imaginary line, the reference dimensions won't be 10' from the bottom wall, but it would be something like 4' 5 7/16" from that other room that has nothing to do with the wall I'm trying to place. Does that make sense? How do I turn off or control the meaningless reference points?