Sent this hand history to some people and they disagree with what's going on in the river. Anyone wanna break it down step by step?

PokerStars Hand #162872689782: Hold'em No Limit ($25/$50 USD) - 2016/12/13 7:31:24 ET
Table 'McMath' 6-max Seat #4 is the button
Seat 1: LLinusLLove ($7009.30 in chips)
Seat 2: w00ki3z. ($10731.56 in chips)
Seat 4: OtBRedBaron ($15612.78 in chips)
LLinusLLove: posts small blind $25
w00ki3z.: posts big blind $50
LLinusLLove: posts the ante $10
w00ki3z.: posts the ante $10
OtBRedBaron: posts the ante $10
*** HOLE CARDS ***
OtBRedBaron: folds
LLinusLLove: calls $25
w00ki3z.: checks
*** FLOP *** [As 6d 7d]
LLinusLLove: checks
w00ki3z.: bets $50
LLinusLLove: calls $50
*** TURN *** [As 6d 7d] [6h]
LLinusLLove: bets $55.68
w00ki3z.: raises $169.68 to $225.36
LLinusLLove: raises $373.29 to $598.65
w00ki3z.: calls $373.29
*** RIVER *** [As 6d 7d 6h] [3c]
LLinusLLove: bets $1026.21
w00ki3z.: raises $2608.29 to $3634.50
LLinusLLove: raises $2666.15 to $6300.65 and is all-in
w00ki3z.: calls $2666.15
*** SHOW DOWN ***
LLinusLLove: shows [6c Td] (three of a kind, Sixes)
w00ki3z.: shows [Ac 6s] (a full house, Sixes full of Aces)
w00ki3z. collected $14026.60 from pot
*** SUMMARY ***
Total pot $14028.60 | Rake $2
Board [As 6d 7d 6h 3c]
Seat 1: LLinusLLove (small blind) showed [6c Td] and lost with three of a kind, Sixes
Seat 2: w00ki3z. (big blind) showed [Ac 6s] and won ($14026.60) with a full house, Sixes full of Aces
Seat 4: OtBRedBaron (button) folded before Flop (didn't bet)