global search finds long deleted posts from long deleted blogs

how come and what can I do to fix it?
plugin is latest version as of right now and post indexer too.

check it out here: http://zice.ro/site-search/coroana/ the 5th result doesn't exist anymore... just in case things change, here is the no-longer-existent result: http://vasile.zice.ro/uncategorized/ursus-berea-fotbalului-romanesc/