The problem with mixing
Pizza takes three minutes in the oven. Egusi takes seconds to ladle. Suya takes twelve minutes on the grill. If every station started when the ticket printed, your soup would wait twenty minutes for your suya and arrive cold.
Backwards timing
The pass works backwards from the slowest dish. When your ticket prints, the grill starts at once, the oven starts four minutes later and the soup is ladled last. Each station sees its own start time on the screen.
The result: everything lands on the pass within about a minute of each other.
One check, one seal
At the pass, one person checks every dish against the ticket and the allergy note, then packs hot and cold in separate sleeves inside one bag. One seal, one rider.
What this means for you
Mixing brands does not slow you down much. The slowest dish sets the time, and it is usually grill or pizza at around 14 to 16 minutes before the ride.
Nobody waits for anybody. The slowest dish starts first.