Delineated watershed not drawing properly (polygon)

jpollak[CodePlex]
The polygon for the watershed is not being drawn properly at times. In the attached example, I've circled the polygon that was drawn in red….as you can see it is a miniature polygon that seems random..

Start by reproducing the watershed polygon drawing problem using the attached example in the HydroDesktop desktop application. Trace the watershed delineation and polygon-rendering entry points, then confirm that the resulting polygon matches the delineated watershed rather than appearing as a small random shape.

Written by the indexing model from the issue text.