[Membership 2 PRO] Membership display order not working

Hi.
Our sort order on memberships is not working. When I save a membership as #2, 3, etc., it always goes back to #1.
Screenshot:

https://www.dropbox.com/s/zrbaqd4iuq2p8dl/Screenshot%202019-10-07%2014.48.33.png?dl=0

Support access has been granted.
Can you please assist?
Thanks.