Tree restructures itself

Hello, I have a fairly simple problem with the Path Mapper component:

I have a set of data arranged in this structure: (121 branches)

{0,0}

{0,1}

...

{0,9}

{1,0}

{1,1}

...

{10,10}

For some reason, whenever I plug it into any other component (addition for example), the tree restructures itself as: (121 branches)

{0,0}

{0,1}

{0,2}

...

{0,120}

This is not a problem if I want to do any computation on the whole data. However, to retrieve a specific branch parametrically (based on its {a,b} position in the tree), my definition does not work because of the self-assigned structure. I'd like to be able to sort this using the Path Mapper but I can't work out the logic to do it or is there a simpler way?

I attached part of my definition with Param Viewer for the relevant part as well as the whole WIP GH definition.

Note: The definition uses Geco and Mesh Explode (2 different plugins) using GH 0.9.0014

Thanks to anyone in advance for any help.

Cheers.