Check out this hand in the Freeroll

Starting Hand
Dealing pocket cards: [Qc, 5d]
zzzollli calls
jim2674 raises $1,500
johnredz folds
acidfud folds
slim p sits out
slim p folds
Arty80 folds
sean221 sits out
sean221 folds
kevin12345 calls
Marice folds
zzzollli folds
Dealing flop: [Ks, Qh, 8c]
Dealing turn: [Qs]
Dealing river: [9c]
kevin12345 shows [Ad, 6d] for a pair of Queens
jim2674 shows [Kh, Kd] for a full house, Kings full of Queens
jim2674 wins main pot $3,100
kevin12345 finishes the tournament 50th
kevin12345 stands up

Im wondering How as he went all in with 1500 and was called by 1 player with 1500, plus the blinds made it 3100 overall, yet after he won the hand he had 4600 chips....somehow it doesnt add up to me....