N series simple issue

Hi! I would like to use a Genepool as an input for the "N" value of a series, so that I get the first gene value for the 0 element within the sries, the second gene for the 1 value within the series and so. Something similar to what you can see in "Group 2". Instead what I get is that the first gene value affects values from 0 to 9 within the first branch, then the second gene value affects the next 0-9 within the second branch, and so ("Group 3"). I have tried mass addition ("Group 1") but it doesn´t work because I´m not getting the right domains. I have also tried split string, entwine, etc. and nothing works. It is simple but I´m not getting it. Suggestions?

THX