Server 2008 RC Folder Permissions

Ok, this is endless for me, and its driving me crazy.

Currently, i have two spicific users folders that seem to every night or so have all the permissions removed from them on the security tab. and this is only on those two users. (nobody else has this problem) and nothing that i can find is listed on the event log that i can see. but i have full auditing on for everyone, it started before i did that, but i was told and actually read about it on here to enable that so it would log all security changes for that folder.