Welcome to the Q&A Forum

Thanks for your answers Cyrus and RankSurge. It all makes sense now.

For the last month I have been tracking my backlinks thru open site explorer. Over the same period I have gone on a minor link building exercise via social media, some directories as well as writing fresh new content for the site.

However, my backlink count has increased in the Rank Tracker tool but my root linking domains have remain at the same level. Is there a lag or is this because some of these site are not in the open site index?

To be specific - I have personally setup follow links from sites like tumblr, posterous, stumbleUpon, delicious and other like these.

Would really like to understand the limitations so I can take the appropriate action.

Thanks