A site I worked on recently used to be joomla based and had a ton of articles within it and the entire business is different.
After clearing out the site (FTP) and starting fresh and finally finishing all was done however, the sites rankings on google are plagued by old pages which no longer exist. Furthermore, Google seems to think these pages do exist.
I was under the impression that after recrawling the site (at whatever time it saw fit) it would recognise those pages are now non existent and replace them when it could.
Its driving me insane. There are 100's of pages, so I can't put in requests to remove them all, won't they ever automatically be removed?