Iirc judo always gives two bronze medals but I’m not sure if this is the case in the Olympics as well. Maybe other disciplines do the same. And according to the metric, it might be possible to have the same points and therefore share one medal.
Gold having 1 more is weird because you would expect no silver if two have gold and therefore a difference of 2. Maybe in one weight class there only qualified one person and got the medal by default?