Workflow split branches contain ", 1s"

Hi all, if you may, I need your help.

I am trying to build a workflow that splits a list into 17 random segments, each has 6% or 5% of a random audience.

When I run the work flow, I get 2 records for each branch, but over the 9th segments, I start getting besides the number of records something like this "2, 1s - v10" instead of "2 - v10" do you know what ", 1s" means?

See a screenshot below.

Thanks,

Alex