The problem of grouping(grasshopper)

[Gavin20181001]

Hello, everyone
I would like to ask
I have an arrangement shown in Figure 1
I want to change it to a pair of two, but there is stagger
What should i do

arrangement.gh (76.0 KB)

[HS_Kim]

arrangement_re.gh (158.2 KB)

[Gavin20181001]

thank u