The inference tables knew FT8 on some bands and nothing on others: a 10.136
spot with a bare comment read as generic DATA — which is what every
skimmerless spot of a DXpedition's 30 m FT8 slot did. The standard FT8/FT4
windows are added on 30 m, 60 m, 80 m (FT4), 17 m (FT4) and 12 m, in BOTH
tables (backend band plan and frontend spot.ts), ahead of the wide segments
they sit inside — order is the mechanism there.