Please do not create duplicate support requests. We replied to your support ticket few moments ago, please check it.
At strategy "Edit" form you can set how favorites are determined, change it to determine favorites by highest matched amount instead of chance value.
Then try it out with small stakes in real mode. This will not work in simulation mode as simulated data does not have traded amount per selection, that value is not provided by Betfair when using delayed data in simulation mode.