Description of problem:
the automatic update of all bind packages (bind-libs, bind-utils, ...) is broken
(using e.g. yum update)

Version-Release number of selected component (if applicable):
bind-libs-9.4.2-0.4.rc1.fc7 (installed)
bind-libs-9.4.2-0.2.b1.fc7 (in F7-updates)

How reproducible:
100%

Steps to Reproduce:
1. have bind-libs-0.4.2-0.4.rc1.fc7 installed (This was not done manually, most
likely it just happened during a former "yum update" call)
2. try yum update - nothing gets updated
or try update manually: 
 rpm -U /fedora-core/updates/7/i386/bind-libs-9.4.2-0.2.b1.fc7.i386.rpm
/fedora-core/updates/7/i386/bind-utils-9.4.2-0.2.b1.fc7.i386.rpm 
/fedora-core/updates/7/i386/bind-9.4.2-0.2.b1.fc7.i386.rpm 
        package bind-libs-9.4.2-0.4.rc1.fc7 (which is newer than
bind-libs-9.4.2-0.2.b1.fc7) is already installed
        package bind-utils-9.4.2-0.4.rc1.fc7 (which is newer than
bind-utils-9.4.2-0.2.b1.fc7) is already installed
        package bind-9.4.2-0.4.rc1.fc7 (which is newer than
bind-9.4.2-0.2.b1.fc7) is already installed

  
Actual results:
nothing gets updated, because a formerly installed version (9.4.2-0.4.rc1.fc7)
is treated newer as the newest version in F7-updates

Expected results:
the package should be updated to the newest version of the package in F7-updates

Additional info:
I assume that for a short amount of time the mentioned version
(9.4.2-0.4.rc1.fc7) was available in the F7-updates, got updated and is now
treated as newer than the newest version in F7-updates.

I'm setting the severy to high, because this problem blocks security updates of
bind without telling the user.