Penalty for same anchor text?

Hi,

I just recently started doing for a site for mine which is a few months old and only had single page without any valuable content until I started off with SEO.

So start out by building majority of backlinks (no scrapebox/amr/xrumer blasts, only web 2.0 and manual commenting) to main home page with my "main keyword" and few to article pages.

The main keyword which was on page 4 is now out of top 100 while other article pages are gaining SERPs for my "main keyword" instead of home page.

Is this some sort of penalty or just google dance?

I would say google dance. I had kinda same problem after doing link building, was on 2nd page in about position 6-10 , vanished but some article sites was on page 10 or so.

Now the site came back and is 4th on 2nd page