helenp - 7:31 pm on Jan 8, 2013 (gmt 0)

Reading your post above again, now that you have fixed your redirection to home page for pages not found, and hopefully you are returning 404 Not Found status, you should see the number of "Not Selected" starting to drop over next few weeks

Hopefully yes, but I am in a hurry as season started, thought drop was maybe only christmas related, and it looks to me as the not selected urls is the cause of the drop as it started more or less at the same time.
Looks like Google are counting rubbish.