What?! you might have miss-understood.
Flop, round of betting, before the last player acts, the dealer burns and tables the turn face up for all to see. The issue is the last action was not complete, the card must now go back into the deck so that it has a chance to come out. To do so at this point ruins the original hand and changes the river card.
The proper procedure from here, is you complete the flop action, burn again (3rd burn card) you then table the river card. There is a round of betting, once action is complete, you then place the turn card in the deck, shuffle, cut, no burn, card comes off and face up on the table.