You are supposed to be able to gang up as many Conditional Subassemblies as you want emananting from one point, at least 10 like you need.
Submit it on a Support Request and let us know if it is a confirmed defect.
By the way, Daylight Standard has user known issues:
Thank you...I will look into it. Is the support request within Civil 3d?
The concept seems simple enough. If in a cut do this, if in a fill do that. Unfortunately, I am not seeing that happen. Time is always an issue, hence the switching back to Terramodel to finish.