I can add users with publishing rights in the default Joomla user manager, but they cannot edit content created in K2, only content created in the Joomla default Article manager.

The process of adding users after adding a user goup in K2 does not give me the option to add a user. I have to set them up in the default Joomla and then import themto the K2 group. The issue then is that when the user is created in this way and then they login to the front end they do not "see" the edit tag in the item. Only superusers can see this tag.