Thanks to bollie for pointing this out and jos235 for bringing it to my attention.
There's a flaw in the FIFA ranking for matches won after PSO in two-legged play-offs.
For instance, Jordan lost 2 - 0 in Kyrgyzstan on October 18th, 2007, then won 2 - 0 at home on October 28th, 2007. After PSO, they won 6-5.
According to FIFA.com, Jordan received 284.75 points for their PSO win.
Let's look at the FIFA ranking formula for this match to see how many points (0-3) were awarded for the match result part.
P = M x I x T x C x 100
I - match importance = 2.5 (World Cup qualifier)
T - strength of opposition = 0.67 (Kyrgyzstan were 133rd)
C - match strength = 0.85 (both AFC teams)
This means M = 284.75 / (100 * 2.5 * 0.67 * 0.85) = 2 points.
If Jordan had won only 1 - 0 (being eliminated in the process), they would have received 427.125 points.
Same goes for Australia's PSO win against Uruguay in the 2006 World Cup OFC - CONMEBOL playoff. 892.4 points instead of 1338.6.