When a player is all-in and there are two or more players in the pot, a side pot can occur. The players then bet out the rest of the hand. If three or more players are on the side and one of those players goes all in, a second side pot continues. Each side pot is exclusive of the main pot and only involves the players that have money invested in them. However, at all times the players are battling over the rights of the main pot. For example, if there is a side pot and a player folds to his opponents bet, he forfeits the rights to the main pot. When all side action is finished, the winner of the side pots are determined first and then the winner of the side pot or pots then contend with the original all-in player for the main pot.

In your example it sounds like there were 7 players with 6 going all in. The fact that there were 5 winners means that the first four all in players won their hands and one of the two players in the last side pot won the rest.

In the case that the pot was divided when both players had two pair, chances are that the fifth card on board was higher than the hold cards in the two players hands. The only other explanation was that they had the same hole cards.