Not being able to delete spells is one of my pet peeves :swear:
I learned this handy tip from Acadian, if you're going to be creating new spells, place a "+" sign in front of your new spell names. It will relocate the new spells you create to the top of your spell book.
It doesn't help delete the old ones, but should help a bunch in keeping the new ones you make from here on out in a nice order at the top of the book. :read:
Yeah, got this habit awhile ago, I add character's name in front of the spell name
Not on top, but at least all of them are in one place.