There is clearly enough doubt to stick with the original decision. Referees virtually never do, though, because they are spineless. They are also far less likely to do so when it adversely effects the elite teams as they know they will be absolutely slaughtered for it, whereas decisions in their favour get forgotten about and brushed under the carpet before too long. Man U, Real Madrid, Juventus, Celtic, it doesn't matter which league it is, those sort of teams get the benefit of any doubt.