First off, sorry if this was posted elsewhere but I couldn't find it if so.
I have an issue where my own summon spells are absorbed i.e. fail, if I take the birthsign Atronach. I know this is not a bug that came out of the Apocalypse Spell Package but comes from the base game (it was fixed in version 1.0 of the Unofficial Skyrim patch but that doesn't cover spells added by mods it seems).
I was thinking it should be possible to edit a file somewhere to add any spells supplied by other mods. Does any knowledgeable person have any advice on a way to do this, or an alternative fix for this problem?