Yep, sorry was thinking of broken quicken - but I am sure I saw someone talk about twinning a fireball, which is definitely not RAW - so if that doe swork, it needs to be changed.
Oh for sure. You should only be able to twin *single-target* spells.
I would perhaps allow the twinning of single-target spells that are being upcast to hit extra targets, but only for a single additional target. E.g., For Command cast at 2nd level=2 targets, you can spend 1 Sorcery Point to hit another target.
