Waxholmsbolaget missing Saturday services in data

Hi,

I noticed that the GTFS Static (beta) API is missing some Saturday services for line 27 under operator Waxholmsbolaget.

Their website suggests there should be services at 14:50 and 19:35 however there are only services on Friday and Sunday in the data.

Would anyone be able to suggest why this might be?

Any help would be greatly appreciated. All the best,

Michael