I too have been seeing strange things of this nature on one of my cable connections. Mine are looking a little different today. This one is located in Guelph, but I can pull up the modem's interface remotely from where I'm at in Kitchener through voodoo magic. Today, mine seem to look like this:
I however am on the Thompson DCM-476 running STAC.02.31. The service seems to be working despite this though. Everything else seems to be in order such as the RF readings.