Deleting old items

Settings below still do not delete old syndicated posts which leads to broken links. How do I trouble shoot?

Updated posts:
When a syndicated feed includes updated content for a post that was already syndicated, should the syndicated copy of the post be updated to match the revised version?

Yes, update the syndicated copy to match

Feed Update Type:
Complete. When items no longer appear on the feed, they are obsolete; retire them from the WordPress posts table.

Allow Feeds to Delete Posts:
Yes. If a feed indicates that one of its posts has been deleted, delete the local copy syndicated to this website.