It's mostly a matter of definitions lagging behind the industry. Scheduled services fly to a published timetable on a seat only basis, whilst it used to be the case that charter served the inclusive tour (IT) market. You could book a holiday, and frequently not know the precise time of the flight until the tickets arrived.
LoCo clearly fits into the "scheduled" definition. It's the charter airlines' response of introducing a mix of seat only and IT on the same flight which has muddied the waters. Mostly, if a significant proportion of the flight is IT, then it will be treated as charter for statistical purposes by most airports. Eventually, the official definitions may catch up.