Sometimes poker confuses me...

This hand confuses me. I was sure I was beat....then I wasn't. So I pushed...and one. Not sure what to make of it.

Hand History:
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Texas Hold'em $1-$1 NL (Real Money), #453,710,051
Table Mombasa, 12 Jun 2007 10:28 PM ET
Seat 1: ender470 ($99 in chips)
Seat 2: HotLemon ($112.30 in chips)
Seat 3: rockoya ($45.50 in chips)
Seat 4: DonFerrum ($75.40 in chips)
Seat 5: Grinding Up ($113 in chips)
Seat 6: DR.MUZL ($118.20 in chips)
Seat 7: LucCaptan ($81.95 in chips)
Seat 8: HarryKings ($11 in chips)
Seat 9: John88888 ($117.90 in chips)
Seat 10: Jeremy-1986 ($143.35 in chips)
ANTES/BLINDSLucCaptan posts blind ($0.50), HarryKings posts blind ($1).PRE-FLOPJohn88888 folds, Jeremy-1986 folds, ender470 folds, HotLemon folds, rockoya calls $1, DonFerrum calls $1, Grinding Up bets $3.50, DR.MUZL folds, LucCaptan folds, HarryKings folds, rockoya calls $2.50, DonFerrum calls $2.50.

FLOP [board cards 7C,8D,3S ]rockoya checks, DonFerrum bets $6, Grinding Up bets $12, rockoya folds, DonFerrum bets $19, Grinding Up calls $13.

TURN [board cards 7C,8D,3S,2C ]DonFerrum bets $32, Grinding Up bets $84.50 and is all-in, DonFerrum calls $14.90 and is all-in.

RIVER [board cards 7C,8D,3S,2C,8S ]

SHOWDOWNGrinding Up shows [ QC,QH ]DonFerrum shows [ 9H,KH ]Grinding Up wins $37.60, Grinding Up wins $152.80.