lucy24 - 1:36 am on Sep 18, 2012 (gmt 0)
Are you currently redirecting or going straight to 404/410? If you pull selected pages out of the 410 bin and start redirecting them, the first thing you will notice is Googlebot running around asking for all those other pages again, including the one's you'd thought it had finally managed to forget. Obviously it's checking to see whether any of the others is suddenly getting a fresh redirect.
Ask how I know this. Ugh. Big mess.