A couple more thoughts.

You might want to download the Kodak troubleshooting document.

http://www.kodak.com/global/en/servi...als/z131.shtml

Take two of the problem test strips. Rebleach one and refix it. If that fixes things then take te second and just refix it. If the second test improves then you're underfixed. If it doesn't then you should bleach longer.

I think that makes sense.