The three measures answer different questions. The average is the arithmetic mean of every sale and is pulled hard by the top and bottom of the market. The median is the middle sale, which is more stable but still reflects the mix of what transacted. The benchmark models a typical home holding its characteristics constant, which is why boards and CREA lean on it when reporting price movement.
Mix is the trap. A month heavy with condominium apartment sales pulls the average and median down while detached values are flat or rising, and a month heavy with new suburban product does the opposite. Nothing about the housing changed in either case, only the composition of the sales. This is exactly why quoting a citywide average at an individual house is misleading.
For the wider context, the same release reported 446 sales, 6.6 percent above the ten year average for the month, 1.63 months of supply and new listings up 12.3 percent. None of those figures value your property, which takes a walkthrough and comparable sales, and that is what Joel Dyck's hand-reviewed valuation provides.