Triangle and contour in v5

[bowerstt]

I am trying to creae acurate .tin files using survey points collected. Using my surveyor+, when i create my .tin file some of the contours appear on the outside of my polyline used for the perimeter. However when i do the same steps/operations using the survce demo this does not happen. I use the inclusion/exclusion prompt and am able to keep all my contours inside my poly line when i use the pc demo version. My questioin is what is the difference in the data collector version and the demo version on my PC? any help is appreciated. thanks