Problem with duplicate packages on system

[jd1008]

# yum check
Loaded plugins: langpacks, refresh-packagekit
cogl-1.16.0-3.fc20.x86_64    is a duplicate with cogl-1.16.0-2.fc20.x86_64
flickcurl-1.26-1.fc20.x86_64 is a duplicate with 
flickcurl-1.25-1.fc20.x86_64
gvfs-1.18.3-3.fc20.x86_64    is a duplicate with gvfs-1.18.3-2.fc20.x86_64
libplist-1.11-2.fc20.x86_64  is a duplicate with libplist-1.10-2.fc20.x86_64
libspnav-0.2.3-1.fc20.x86_64 is a duplicate with 
libspnav-0.2.2-6.fc20.x86_64
openvpn-2.3.2-6.fc20.x86_64  is a duplicate with openvpn-2.3.2-4.fc20.x86_64

How can this be?
I thought yum update takes care not to allow duplicates?