calendar sync rights

Hi, i tried eM Client 6.0.23421.0 for shared calendars.
I have two different kind of shared calendars using
The first calendar is read-only, but u can still edit appointments in eM Client and the result will not be synced at to server. If u try to delete an appointment from eM Client, there is a message that shows insufficient rights.
The second calendar is enabled for all users. But if u delete it in, it will not sync to eM Client. If u are editing some appointments, the syncronisation works in both directions.