Total Amount Of World Cup 2018 Qualifiers

http://www.fifa.com/worldcup/preliminaries/statistics/index.html says 304 out of 851 games have been played, meaning 547 are left. I looked at the qualifying formats on Wikipedia and got 540 games left which I will list below. Can anybody explain the discrepancy of 7 games?

AFC: 76
14 games to end Round 2 (assuming Kuwait doesn't play any more)
60 games in Round 3 (2 groups of 6 with 30 games each)
2 games in Round 4 (the playoff between the third place teams)

OFC: 29
12 games in Oceania Nations Cup (Round 2) Group Stage (2 groups of 4 where you play each opponent once)
3 games in Oceania Nations Cup knockout rounds (2 Semifinals and 1 Final, although all of these teams advance in World Cup 2018 Qualifying)
12 games in Round 3 (2 groups of 3 with 6 games each)
2 games in Round 4 (the playoff between the group winners)

CONMEBOL: 65
13 matchdays with 5 games each

CONCACAF: 48
18 Semifinal games (3 matchdays with 6 games each)
30 Hexagonal games (1 group of 6)

CAF: 60
60 Round 3 games (5 groups of 4 with 12 games each)

UEFA: 258
250 Group Stage (Round 1) games (7 groups of 6 with 30 games each and 2 groups of 5 with 20 games each)
8 Playoff (Round 2) games (4 two leg series)

Interconfederational Playoff: 4
2 two leg series

I also added the amount of games played so far to be 309, not 304 like FIFA said. Here's my explanation:

CONCACAF: 64
46 games in Rounds 1 through 3 (23 two leg series)
18 Semifinal games)

CONMEBOL: 25
5 matchdays with 5 games each

OFC: 6
1 group of 4 where you played every opponent once

AFC: 148
12 games in Round 1 (6 two leg series)
136 games in Round 2 (I added up each team's games played total)

CAF: 66
33 two leg series in Rounds 1 and 2

Obviously UEFA and the interconfederational playoffs haven't started. Can anybody explain this discrepancy?