Boundary Point Labels

Hi All, 

I have a little problem I'm hoping someone can give me a few pointer on. 

I'm attempting to label multiple points, depending on which curve they live inside. 

My method looks at whether each point is within each boundary, it builds a sequence based on a boundary tag (A,B,C) and multiplies this (using duplicate) by the number of points so i can then cull this list using the boundary test results, and assign the results to the original point positions. 

This seams to work only some of the time. Other times it gets slightly muddled. 

(There is a second tag which labels the boundary but this is not important)

Is there an easier way to do this? I am quite new to GH so may have got the wrong end of the stick.

Many thanks