how does he make this call?

[Maddie84]

Full Tilt Poker
Pot Limit Omaha Tournament
Blinds: t15/t30
2 players
Converter

Stack sizes:
Rated RK: t330
BB: t2670

Pre-flop: (2 players) Rated RK is SB with 5[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Rated RK raises to t60</font>, BB calls t30 <font color="aaaaaa">(pot was t75)</font>.

Flop: 3[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img] (t120, 2 players)
BB checks, Rated RK checks.

Turn: J[img]/images/graemlins/spade.gif[/img] (t120, 2 players)
BB checks, Rated RK checks.

River: J[img]/images/graemlins/heart.gif[/img] (t120, 2 players)
BB checks, <font color="#cc0000">Rated RK bets t80</font>, BB calls t80 <font color="aaaaaa">(pot was t200)</font>.

Results:
Final pot: t280
<font color="blue"> BB showed 2s 4d 5d 6s</font>
<font color="blue"> Rated RK showed 5c 4h 2h 6d</font>

he calls with the worst possible hand albeit it was identical to mine so he can only split (never win). can anyone explain the call!!