lucy24 - 5:01 pm on Jul 21, 2012 (gmt 0)
#2 is the hallmark of a page that is roboted-out or otherwise inaccessible, but not marked "noindex". So g### knows that it exists but nothing else.
(Question for those in the know: If a page's links are all marked "nofollow", will the same thing happen?)
Take a closer look at your redirects and make sure all of those old URLs are going where you want them to go. If you're on speaking terms with the outside linkers, ask them to update their links. Try the old URLs in non-standard forms-- with or without www, with explicit "index.html" if it's a directory, with phony parameters-- and make sure everything gets either a 301 or a 410.
You can also go into gwt and have pages or directories removed from the cache and/or index.