I experience problems with eMclient syncing with google contacts. eMclient keeps duplicating several contacts. Out of my 500 contacts each time I open eMclient I notice several contacts that are duplicated. From 8 up to 20 times the same contact! At three or more contacts per opening… And each time I try to remove the duplicated ones I receive a message: cannot remove them. Although they are removed for the moment. Can someone help? 
Hi, are you experiencing this behaviour in newest version? If so have you tried using deduplicator tool?
Jan