I see those .edu back – which I haven’t seen in a while. I think google has reverted to an old index, then the new one, then a really old one, then a one from 10 years ago, then the new one, then one form 3 months ago, then the new one………………ETC.
Same song and dance. As Rick Flair says, “Like it or don’t like it, you better learn to Love it.”
Back links, no back links, PR no PR, Buy links don’t buy links, trust rank no trust rank, flow no flow links, good neighbourhoods bad neighbourhoods, duplicate content BAD Duplicate content’s OK, multiple domains on one server OK or IT’s VERY bad, Matt Cutts tells no lies, Matt Cutts has no idea what he’s talking about blah, blah blah
If you try to figure out google (which I stopped a while ago) you will drive yourself to the nut house. Let alone try to explain it to other people not in the AFF or online marketing business.