Blog page issue

I am working on different keywords but nowadays i am facing a problem of blog page.

Keywords are ranking well but when they are on a good position like 2nd or 3rd page the targeted page is coming but after few days blog page from the same keyword will be there and the original page will go far away like 90.

So i want to know the specific reason behind that.

Any help would highly be appreciated...

 

I need the answer urgently. So plz answer this question.

 

Use limitedly your inner page keywords at home page.

Build the backlinks of your inner pages using the targeted keyword as anchor text. It solves your problem.