Ok, explain how i could've avoided this one please

ame #161772651: $5 + $0.50 Sit & Go (1009033), Table 1 - 20/40 - No Limit Hold'em - 2:46:18 ET - 2005/07/22
Seat 1: Kootstra (1,530)
Seat 2: bwconvention (1,455)
Seat 4: snowchic4 (1,395)
Seat 5: Amplegiro (3,060)
Seat 6: CASHMEIN (2,730)
Seat 7: timmy211 (1,500)
Seat 8: clonefan88 (240)
Seat 9: haku1 (1,590)
Kootstra posts the small blind of 20
bwconvention posts the big blind of 40
The button is in seat #9
*** HOLE CARDS ***
Dealt to bwconvention [2s 2h]
snowchic4 folds
Amplegiro folds
CASHMEIN calls 40
timmy211 folds
clonefan88 raises to 240, and is all in
haku1 folds
Kootstra calls 220
bwconvention calls 200
CASHMEIN calls 200
*** FLOP *** [2c Kd Kc]
Kootstra checks
bwconvention checks
CASHMEIN bets 280
Kootstra folds
bwconvention calls 280
*** TURN *** [2c Kd Kc] [5c]
bwconvention checks
CASHMEIN bets 960
bwconvention calls 935, and is all in
CASHMEIN shows [Kh Jd]
clonefan88 shows [6d 6c]
bwconvention shows [2s 2h]
Uncalled bet of 25 returned to CASHMEIN
*** RIVER *** [2c Kd Kc 5c] [Jc]
CASHMEIN shows a full house, Kings full of Jacks
bwconvention shows a full house, Twos full of Kings
CASHMEIN wins the side pot (2,430) with a full house, Kings full of Jacks
clonefan88 shows a flush, King high
CASHMEIN wins the main pot (960) with a full house, Kings full of Jacks
clonefan88 stands up
bwconvention stands up
*** SUMMARY ***
Total pot 3,390 Main pot 960. Side pot 2,430. | Rake 0

Board: [2c Kd Kc 5c Jc]
Seat 1: Kootstra (small blind) folded on the Flop
Seat 2: bwconvention (big blind) showed [2s 2h] and lost with a full house, Twos full of Kings
Seat 4: snowchic4 didn't bet (folded)
Seat 5: Amplegiro didn't bet (folded)
Seat 6: CASHMEIN showed [Kh Jd] and won (3,390) with a full house, Kings full of Jacks
Seat 7: timmy211 didn't bet (folded)
Seat 8: clonefan88 showed [6d 6c] and lost with a flush, King high
Seat 9: haku1 (button) didn't bet (folded)