Problem with my current member account name with facebook account merging!

I have a slight confusion. I have a weird problem.
Today I logged in chess.com via facebook with my facebook login details, (just now). I appear to have a 2 week free diamond membership.

However, my username is RahulIslam when logging in via facebook and both accounts have been merged with BLaZiNgSPEED and it says Member Since: Jun 20, 2010 on both of them now.

But why is it that when I login with BLaZiNgSPEED I can't play as a diamond member? They act like 2 separate accounts.

I would like to play as BLaZiNgSPEED But instead when I login to facebook and play from there it appears to log me in as "RahulIslam". Only with that name I can select 3D chess pieces, etc.

Here is my BLaZiNgSPEED chess.com account. http://www.chess.com/members/view/BLaZiNgSPEED 

As you can see profile picture is the same.

However when I try to even merge my facebook chess.com login with my separate chess.com member account I get this
"Error 717: This account is already premium. Not able to merge."