i also had the problem with the "Do i want to summon a demon" quest. it won't go away until you complete it and you just can't come back to it when you tell her that you don't want to do it.
As for the scroll of the lizards, you don't need it. if you are going to the land of the dead soon the teleporters have no importance. the quest should be gone once you find seven of any scrolls. example: if you have all but the lizards but you have 2 of the humans, then the quest will still complete itself. but mabey you still can ask him for the scroll at the council of seven.
And for the other one. i don't understand why you are having problems. the dragon armor quest has nothing to do with the council of seven quest.
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