Overoptimization issue?

I have few websites, where Google de-ranked the homepage for main keyword and is ranking a sub-page of that particular website, but at significantly low position. All of the websites are EMDs and have exact anchor text approximately around 10%.

Case 1:
Food blog with recipes
Homepage not ranking
Specific recipe (sub-page) ranking #118

Case 2:
Food blog with recipes
Homepage not ranking
Specific recipe (sub-page) ranking #60

Case 3:
Song lyrics website
Homepage not…

Overoptimization issue?