How was this hand won? Beginner PLO question.

[Swallowtail]

Just started playing PLO, so please be kind if I'm asking a dumb question. Playing on Pokerstars and watched this hand take place. How did "mgolba" not win the hand with an A high flush?

PokerStars Game #12911812044: Omaha Pot Limit ($0.10/$0.25) - 2007/10/29 - 01:18:35 (ET)
Table 'Storeria' 6-max Seat #2 is the button
Seat 1: Shrivel ($21.50 in chips)
Seat 2: BaggitNSTFU ($8.30 in chips)
Seat 4: mgolba ($15.90 in chips)
Seat 5: deviIbiss ($18.45 in chips)
Seat 6: vandampoker ($22 in chips)
mgolba: posts small blind $0.10
deviIbiss: posts big blind $0.25
*** HOLE CARDS ***
Dealt to Shrivel [Tc 6s Ah Kh]
vandampoker: folds
Shrivel: folds
BaggitNSTFU: raises $0.60 to $0.85
Roothluss joins the table at seat #3
mgolba: raises $0.90 to $1.75
deviIbiss: folds
BaggitNSTFU: calls $0.90
*** FLOP *** [7c 7s 3c]
mgolba: bets $0.75
BaggitNSTFU: calls $0.75
*** TURN *** [7c 7s 3c] [6c]
mgolba: bets $1
BaggitNSTFU: raises $4.80 to $5.80 and is all-in
mgolba: calls $4.80
*** RIVER *** [7c 7s 3c 6c] [9c]
*** SHOW DOWN ***
mgolba: shows [Ac As Ts 5s] (two pair, Aces and Sevens)
BaggitNSTFU: shows [9h Qc Jc Qh] (a flush, Queen high)
BaggitNSTFU collected $16.05 from pot
*** SUMMARY ***
Total pot $16.85 | Rake $0.80
Board [7c 7s 3c 6c 9c]
Seat 1: Shrivel folded before Flop (didn't bet)
Seat 2: BaggitNSTFU (button) showed [9h Qc Jc Qh] and won ($16.05) with a flush, Queen high
Seat 4: mgolba (small blind) showed [Ac As Ts 5s] and lost with two pair, Aces and Sevens
Seat 5: deviIbiss (big blind) folded before Flop
Seat 6: vandampoker folded before Flop (didn't bet)