If you set up your Control and Alt macros, you can solve your problems. When I cast spells with a macro, the game never asks me if it wants AOE on or off. It just casts the spell using the current aoe setting. Here's an example of my protect macro.

/aoe on
/ac "Protect" <me>
/aoe off

This casts Protect with AOE on on me and then sets it back off so I don't do something stupid when I cast Fire II, lol

/ac "Fire II" <t>

This casts Fire II on the target I'm currently on. The game doesn't stop and ask if I want AOE on or off, it just casts it.

Hope this helps