For large stadium events (such as Marvel Stadium and Optus Stadium), the aisle information printed on tickets may be different to the aisle number you selected at time of purchase. This aisle refers to the walkway which is closest to your seat.
For example, seats purchased in section Aisle 25, may print as Aisle 24 depending on which aisle is closest to your seat. The seating information on your ticket is correct; this system simply reduces congestion.
Please see the below example for clarification.