No wrong Both Rajdhanis got LHB Rakes in the year 2006.True as check from Wikipedia now.Clearly it mentions that Howrah Rajdhani Express got LHB Rakes on 3rd of February 2006,while Sealdah Rajdhani Express got LHB Rakes on 23rd of August 2006.
Proof: WIKIPEDIA FOR THE FREE ENCYCLOPAEDIA ЁЯЩПЁЯП╗ЁЯЩПЁЯП╗ЁЯЩПЁЯП╗ЁЯЩПЁЯП╗ЁЯЩПЁЯП╗ЁЯЩПЁЯП╗