I have run cross sections in my drawing, and on a few of the section line groups, it is giving me a minimum elevation that is +/_ 500' lower than my actual minimum elevation. The resultant cross sections look like a NY skyline. I have checked my surface tins, and there is nothing extending to these lower elevations. If I explode the cross section, I lose my labels and surface lines.

I there a way to control the minimum elevation for sampled surfaces?