I have an interior cell divided into 2 sections, 1 is large hallway, the other a large inner room. I've set up load doors to teleport player between sections but of course it being the same cell I get the same name on the load doors both say "Open Sewer". This is not a big issue but there must be a way to seclude one of the sections or both like when making ambient occlusion boxes around areas. The game does this when player enters Whiterun or Solitude, both of these areas are exterior and player teleports from the exterior. Thanks guys.

They do not, when you enter Whiterun it's actually a completely different world with Tamriel set as it's parent (so it can use it's LOD). Same thing with Solitude.