Shaing and Security Permissions SBS 2003 Etc

Hi,

I've went over this quite extensively elsewhere on EE but I'm still having issues.

I have a share that one group and a couple of individuals, one of whom is a members of the admin group, intermittently run across files within that share that access is denied.

After a week now I'm still running into this.  DrUltima and Dematzler were great and forked out a ton of great info.  But for some reason here I am again.  

For instance, there's one folder within this share that when logged into the SBS, as admin, it says access is denied.  Even though on the folder it says clearly that the admin as well as everyone who should have full control, does.  I can take "ownership" and resolve it, but that isn't what I should need to do.

Could this possibly be due to the folder that I can't access having been created BEFORE some of these people were granted access?  

This has been perplexing and frustrating.  

dematlzer and drultima using the analogy of a museum and keys made perfect sense but it just doesn't seem to be working when I implement it.

Any ideas?  I have a folder right now that I can drill down into then at a certain point, I can't get any further.  Please see attached shot.  I don't know what to do.  It's drving me crazy.  The odd thing here on this is that the admin doesn't have access but everyone that needs to get into this folder and its subfolders can.  

That being said, they keep running into files within the folders that they can't open.  I have to go in and take ownership as admin and then set permissions again.

Any thing would help as I'm just as frustrated as one person can be at this point.

Thanks