Branch Structure Question Using Plane Curve Intersection

I've got two curves {15} and {16} that I want to find the point of intersection with pairs of planes  ex. {15;0} N=2, {15;1} N=2, {15;3} N=2...etc and {16;0} N=2,{16;1} N=2, {16;2} N=2...etc 

Im hoping to keep the {15} {16} branch structure because its keeping the organization by floor level.

Any insight into how the Curve Plane Intersection is matching the branches for operation would be helpful as well. 

Thanks!