Only your best two units of English is counted, so most likely ext 1 is counted along with one unit of English Adv to make up for the two units.
As for the second one, your subjects will get scaled before they are used to get obtain your aggregate, upon which the UAI is based. It's pretty pointless to scale subjects apart from calculating the UAI, so it is done before the calculation.
As for the second one, your subjects will get scaled before they are used to get obtain your aggregate, upon which the UAI is based. It's pretty pointless to scale subjects apart from calculating the UAI, so it is done before the calculation.