Controlled substances get counted twice, and the second one is blind.
The first total is banked and hidden. The tray has to physically empty before the second count starts — Tabulora waits for the camera to see it clear, so a “second count” cannot be the first count confirmed twice. If the two disagree, nothing saves until somebody recounts.
Which fills need it is read off the Rx number: one that starts with 2 or 4 is counted twice. That rule is fixed in the app, not a setting, so tell us first if your pharmacy numbers its controlled prescriptions another way. It does not depend on a lookup succeeding.