TwinColSelect

Hello, it is possible to get some order of adding the values in this component ?

By the twinCol.getValue()

I get the values not in order which I add/select them

No, unfortunately not; the TwinColSelect always returns a Set. If you need ordering, you need to use another component or build one yourself using e.g. two ListSelects.

You could try the add-on
ListBuilder
.