Dalaran Heist: Buffed Doppelgangster

My Doppelgangster was buffed +2/+2 from a “bob the Bartender” card. The next game I played him as the 4/4 he was, and the two copies were still 2/2. The card reads: “Battlecry: Summon 2 copies of this minion” Shouldn’t that mean all copies would be 4/4?