FDOT Open Roads - Pond Modeling Question

Hello,


I'm going through the pond modeling webinar and I've run across an issue that appears to be unique to me. When I go to the point of assigning a profile to the RetentionArea level denoting the control elevation of the pond and I use the "Profile by Constant Elevation" tool I follow the webinar and do not set an element type (left as "none"). Once I datapoint to confirm the elevation of the element  then the 3D model and cross-sections show a "DitchBot_pm" line at that elevation. This ditch bottom line does not appear in the webinar cross-sections or 3D model. Why does this line automatically show up and how can I control the level this line shows up on because technically it is the retention area/control volume, not the bottom of the ditch.


Thank you,

Sam