I have noticed a few new bugs or glitches on my Xbox 360 and was curious if anyone knew any fixes to stop...

-repeating misc objectives (retrieve Another helm of winter hold),(retrieve the mirror for captain aldas),(find tolfidrs alembic)
-not being able to do the destrouction ritual spell (93 dest)
-dead ncps being alive again (found skjor calling me a whelp,killing had no adverse effects but dont want to see him keep respawning)
-repeating conversations ("I'm a thane what does that mean"),("there is room for a new thane in my court")

I cannot remove updates,then I get an error message

Destruction quest required 100 for me.

It was one of my favorite quests too. No quest markers at all, just using your head and solving riddles. And, you get a cool book.

As for the other problems, not sure. I've collected over 20 fine cut void salts, so meh. They fetch a decent price.

really? on my first and second save game it was 90,Im just tired of the same book in a different place,and yes I really loved that quest