V,
Results with 4 goals often have odds higher then +/- 30/1, f.e. Juve - Roma from Thursday, a 4-0 or a 4-1 have odds from 51/1 for 4-0 and 41/1 for 4-1. So therefore, the other results option has high odds.
If the odds for a 4-0 are less then +/- 30/1, I will always lower the odds or add them to the result options, I don't know how Bisco or Il Principe handle this but I look at the odds and base my odds for other result on that.
And especially in SerieA matches, it is so that the odds for results with 4 goals are high since the league isn't known as a high scoring league.
But maybe we should just add a max for other results like 31/1 or something like that.