However, it is my supposition that I had a domain name server glitch back in January and this failure gave the sites redirecting to mine added weight and thus Google saw these sites as my sites. The direct consequence is that my top four sites are now in Google’s supplemental index in a state of perpetual dormancy and no longer get spidered.
Sounds plausible. The site of mine that lost its home page does go down every now and then.
My other site which has had 1 sub page 302'd in the index hasn't gone down as far as I know, though at heavy traffic times it may have problems.