Why I lose my page rank after 301 redirect?

Question

As we all know Google treats sub-domains as completely separate domains so we have to fight for both, to get ranked in search results.

One of my client website was like they having example.com and blog.example.com. So in mind to keep all stuff in one place we redirect blog.example.com to example.com/blog/

But in this case we lost our pagerank and are still wondering where we went wrong or it just takes few more time to showoff.

So what is the reason behind this?

Answer 1

The page rank wont show up as transferred until the next page rank update takes place, the last one was about 2 weeks ago so it will show up in about 10 weeks.

This is the public page rank, the page rank Google actually uses is updated constantly but they dont display it to the public, they only show a abbreviated version once every 3 months.