Submit -- submit your changes from the browser to the instance loaded in memory on the server side
Save - commit the changes to the repository
There is no Submit button anymore in the new RMA in Blaze 6.9. It used to be in the classic JSP-based RMA because in some cases the web form wouldn't automatically be notified when you change something in the rule definition (sort of browser implementation issues). Save permanently saves your changes to the repository (and it includes Submit functionality by default). Then there is check in - that's where your saved changes become the official part of the rule base accessible to everyone else.
Retrieving data ...