Comment 3 for bug 540311

I have sent this issue to upstream for knowledge of Gnome developers because is more like an usability problem, any way, @OmerAkram sent me the steps to do this:

"right click on a contact, click edit and type something in the field before the button "add group" and you will be able to add a group. When adding a new contact you also have the option to add a new group"