I'm sorry, I took a second look and is not working. when the plugin worked userprefs.cfg shows all the dockers in the desired order and a position for the folder. Tried to replicate that without success.
Getting the uptime of the dockers using "docker inspect", it is actually using an alphabetical order, first A-Z then a-z (ignoring GUI)
Sorry if I wrongly got anyone hopes up, the issue seems to be elsewhere.