So with Y:\songkong5\muscfiles\429566 & Y:\songkong5\muscfiles\429567 these are discs 1 and 2 of Vespro della Beata Vergine https://musicbrainz.org/release/06ecbd9a-0199-4e65-be63-7b7e903aa08f
but SongKong works on and album not disc basis and there is nothing in the existing file/metadata structure so that songkong realizes 429566 and 429567 are form the same album. If your folder structure
Y:\songkong5\Vespro della Beata Vergine\
Y:\songkong5\Vespro della Beata Vergine\429566
Y:\songkong5\Vespro della Beata Vergine\429567
then I think it would match okay but it makes sense to a allow match if option enabled if the grouping totally matches a disc as it can be difficult for SongKong to determine that two folders present two discs on a release.