If multiple entry points are place but not rotated you will only ever see two, one would be "H" and the other would be "N".
So if 8 were placed and not rotated 1 would be "H", another 1 would be "N" and the other 6 would not show up.
As for you not having any showing up?
Did you "Check Terrain" in the "Object Report"
Sometimes you may need to hit "Build" again.
You can send me your .oba file if you want so I could try and help in finding where things are going wrong.
Pokie
tscott@accesswave.ca