SETTLE THIS ONCE AND FOR ALL !
Area spells are never considered targeted for the purpose of who they affect (only for the purpose of who you can cast on). The manual is misleading in this (stating that Spell Deflection/Turning/Trap affect area spells targeted on the caster; they don't!).
[url="http://www.sorcerers.net/Games/BG2/SpellsReference/Main.htm"]Baldur's Gate 2 Spells Reference[/url]: Strategy, tips, tricks, bugs, cheese and corrections to the manual.