Thread:Project:Support desk/Sysop and Bureaucrat User Rights keep disappearing./reply (7)

Ok, so this is either a bug in JFusion or only a configuration problem. In order to make sure it is not a configuration issue, first check, that you have configured JFusion correctly, meaning in a way that others (who know JFusion; I don't) tell you: "Yes, giving permissions to the MediaWiki users should now work." Maybe during that process you already get the issue solved.

Good luck! :-)