I've never noticed this before, but when I have Flame Atronach in the left hand and Sanguine's Rose in the right, they cancel each other out. As soon as I summon one, the other disappears.... Is this normal???

My follower also conjures a Flame Atronach wihch may be why I never noticed before - but WHY only one at a time?

Do you have the perk Twin Souls in Conjuration? If not, that's probably why, but I'm not sure

Yes its normal as you can only have 1 conjured monster at a time unless you have the lv100 conjuration perk

Because you need perk Twin Souls than you can have both out at the same time.

I wish they would fix the bug where spell absorbtion absorbs your conjuration spell aswell its kinda annoying.

Ah. Thank you.

But I find it odd that you can't summon with a spell and summon with a staff...