Red Hat Satellite (Disconnected) 5.6 drops channel content

This has now happened to me twice and Red Hat GSS can't explain whys, so I'm posting here to see what others know.

Within the last few weeks, I'm not able to sync or get the latest content after importing in update isos for RHEL5 x32 and x86_64 channels. Since I operate a disconnected RH Satellite, its going to take forever to download everything and import it back in.

This happened earlier this year with RHEL6 x86_64 content too.

Red Has GSS has attributed this to either ISO file corruption and/or Intermittent sync issue. How do I know that this is happening or is there a way to prevent this from happening?

thanks