Is the number of counterbalancing groups in shelf limited?

Online experiments
1

Version 2022.2.4

Hi!
At the moment I am trying to create a counterbalanced online experiment with shelf.
I have 5 groups to counterbalance. The problem is that I can only define 4 groups in the shelf component.
This means that if I define for example groups: “A”, “B”, “C”, “D”, “E” and groupSizes: 1,1,1,1,1 and I click on the update button, then the first line in group “A” and groupsize “1” is deleted.

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Does this mean that I can only counterbalance four groups?

Thank you very much!

2

I don’t know why but it worked when I wrote the groups and groupSizes from left to right (not from top to down):
“A”,“B”,“C”,“D”,“E”

vs.

“A”
“B”
“C”
“D”
“E”