Rating Calculation - Strange Result(s)

It's all down to the footedness. I think I remember seeing something on the SI forums about how a player whose passing is high but only one footed is not as useful as someone with good passing who is both footed. Not sure quite how it works in terms of actual ratings, but certainly a keeper who can only kick with one foot when clearing under pressure is not going to be as good as one who can kick well with either foot.