upgrading/downgrading - what does this mean?

[Neal Becker]

Channels have 12 new packages.
Computing transaction...

Upgrading packages (6):
  bind-30:9.3.2-33.fc5 at x86_64
  bind-libs-30:9.3.2-33.fc5 at x86_64
  bind-utils-30:9.3.2-33.fc5 at x86_64
  caching-nameserver-30:9.3.2-33.fc5 at x86_64
  imlib-1:1.9.13-27 at i386
  imlib-1:1.9.13-27 at x86_64

Downgrading packages (1):
  caching-nameserver-30:9.3.2-33.fc5 at x86_64

Why is caching-nameserver upgrading and downgrading?

Why is it doing anything at all?  I don't have caching-nameserver installed.
rpm -q caching-nameserver
package caching-nameserver is not installed