The last row in the alternate-schedules editor is the catch-all default:
ReplacePlayoutAlternateScheduleItemsHandler excludes the highest-index item
from the saved rows entirely and only keeps its ProgramScheduleId as the
playout's default schedule, so any recurrence edits made to that row (days of
week/month, months, date range) were silently discarded on save.
Disable the recurrence controls (chips, selects, limit-to-date-range
checkbox) whenever the selected row is the default, and show an inline note
explaining why. The Templates editor is unaffected — its handler saves every
row's recurrence fields as-is, so RecurrenceFields there keeps full editing.
timothy
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