Why is an attendance counted on a different subscription than expected?

The app chooses by itself, with fixed rules: a subscription current that day that gives access to a group of the session; a monthly subscription comes before a card; between two subscriptions of the same kind, the order of Subscription types. A card is only used when the monthly subscriptions that fit are full.

To change the result, the owner can change the order of the types (drag ≡), change the Accessible groups, or adjust the month (This month +). The subscription is not chosen on the attendance sheet. The count is recalculated right away.