Openfire group members don't reflect users in AD groups

There are several distribution groups that we have in AD before I installed Openfire. When I look at some groups the members may not match what I see when I look in the Openfire console. I’ve added users to groups and they have shown up but some old ones that should have been there, never do.

I’ve restarted the services, reinstalled Openfire, cleared cache but I can’t get AD and Openfire groups to sync complely. Has anyone else experienced this? Any solutions or possible causes?