On the sitemember

Recorded night

A night the addon recorded: who was there, what dropped and who said they were coming.

What it does: Shows the duration, the bosses (killed and wipes), who was there and the loot that dropped at that time. If the night is linked to a scheduled raid, it puts side by side how many said yes and how many the addon measured, and names who said yes and did not come and who came without replying. Whoever can schedule a raid links the night to a raid, or unlinks it.
Who sees it: Whoever shares a Discord server with the guild. Linking and unlinking is for whoever can schedule a raid.
Where to find it: In raids, in the list of recorded nights; in the dashboard, in the latest nights; in the attendance squares on a person's sheet; and in the post the bot makes on Discord after the night.

“Agreed vs measured” only appears when the night is linked to a scheduled raid. The number of who said yes stays on screen and is never replaced by the measured one.
The night links itself to a raid of the same instance when it starts between 2 hours before and 8 hours after the scheduled time. Outside that, it stays without a raid.
To link by hand, the list brings the guild's raids from 7 days before to 7 days after the night, except cancelled ones.
Whoever came without replying counts the same as whoever replied.
“Dropped here” gathers loot by instance and by the night's time: the loot does not know which night it came from.
The bot only posts the night on Discord if it is up to 48 hours old, and only in the channels where the pinned raid list is.
The day and times appear in your time zone.

“nobody was measured” with bosses on the list: the addon recorded the bosses, but not the group snapshots. It does not mean nobody was there.
Whoever said yes without a character confirmed in the roster does not appear in “said yes, did not come”: without a character, there is nobody to compare.
“Nobody marked this night as a raid here” even with a scheduled raid: it did not have the instance chosen from the list, or started outside the window. Choose the raid from the list and link it by hand.