please tell me why this isn't an error in party's software

[Unabridged]

why does WinstonSomme get to raise again after DEETEE goes all in for .73 more than a $2 bet?

***** Hand History for Game 3003659181 *****
$25 PL Omaha - Tuesday, November 08, 17:08:19 EDT 2005
Table Table 65457 (Real Money)
Seat 1 is the button
Total number of players : 10
Seat 1: WinstonSomme ( $22.50 )
Seat 2: poppos ( $8.95 )
Seat 4: boss46 ( $30.42 )
Seat 5: MoxNix ( $14 )
Seat 7: cart5r ( $10.46 )
Seat 9: DEETEE ( $5.48 )
Seat 10: ME ( $47.60 )
Seat 8: Bills_420 ( $14.25 )
Seat 3: MNparks ( $4.75 )
Seat 6: vssd210 ( $24.75 )
poppos posts small blind [$0.10].
MNparks posts big blind [$0.25].
** Dealing down cards **
MoxNix calls [$0.25].
vssd210 folds.
cart5r calls [$0.25].
Bills_420 calls [$0.25].
DEETEE calls [$0.25].
ME calls [$0.25].
WinstonSomme calls [$0.25].
poppos calls [$0.15].
MNparks raises [$0.50].
MoxNix calls [$0.50].
cart5r calls [$0.50].
Bills_420 calls [$0.50].
DEETEE calls [$0.50].
ME calls [$0.50].
WinstonSomme calls [$0.50].
poppos calls [$0.50].
** Dealing Flop ** [ 7h, 9c, 8h ]
poppos checks.
MNparks bets [$2].
MoxNix folds.
cart5r folds.
Bills_420 calls [$2].
DEETEE calls [$2].
ME raises [$4].
WinstonSomme calls [$4].
poppos folds.
MNparks is all-In [$2]
Bills_420 folds.
DEETEE is all-In [$2.73]
ME calls [$0.73].
WinstonSomme is all-In [$17.75]
ME folds.
** Dealing Turn ** [ Th ]
** Dealing River ** [ As ]
MNparks shows [ Qs, Ah, Qh, 4s ] a flush, ace high.
DEETEE shows [ 7s, 2c, 7d, Ts ] three of a kind, sevens.
WinstonSomme shows [ Jd, Tc, 2s, Kc ] a straight, seven to jack.
WinstonSomme wins $17.02 from side pot #2 with a straight, seven to jack.
WinstonSomme wins $2.09 from side pot #1 with a straight, seven to jack.
MNparks wins $22.80 from the main pot with a flush, ace high.