1. eliminate duplicates from newItems list in _updateChangeSet 2. don't let _updateChangeSet try to install things which are already installed
1. eliminate duplicates from newItems list in _updateChangeSet
2. don't let _updateChangeSet try to install things which are already installed

fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary