Update:
Add "action:Push instances", "action:Insert instances".
Sample capx
These two actions will change the order of items in the list if there has repeat items.
For example:
The list is "[1, 2, 3]" now, then run "action:Add instances" to add "2" into list. The result will still be "[1, 2, 3]" -- ignored repeat one.
If run "action:Push instances" and push back "2" into list. The result will be "[1, 3, 2]" -- remove "2" then push back.
xoros
Here it is.