Hey Richard,

I am not sure that I understood what you are not able to do correctly but here is what I would do to achieve what you mentioned.

1 Create a Repeating group for the first two elements
2 Create another repeating group with only one cell
3 Create another repeating group inside repeating group n2 with the rest of the elements

This should achieve what you want

It should be something like this:

Please let me know if this works

Best

Julian