So,

I had Zimbra 2 installed on a MAC & a PC (Now I am trying Zimbra 7 Beta)

Both had the same issue:

They would Sync all data between each other (With the ZCS actually) with no issue, except Filters. It seems like if I create a Filter on one unit, the other ignore's it or removes it. If I log into the web client and change a filter... It does not bring it down to the Desktop Clients. Anyone had trouble with Filters?