[pentawebexperts]

There may be some other factors that involve in your degradation in page rankings. Over modification can also harm the site. In my views if you are doing constantly do follow seo then it might also be happened because of it because Google may treat them as unnatural back link building strategy. Secondly your were doing seo as per your previous on page modifications and since you changed your site it may be harm your previous seo strategy. So try to check your on page seo from the beginning and then focus on off page seo.