What I want to turn off is basicly, Whenever you pickup a scroll/grenade/arrow(?) it automaticly gets added to your skill/quick - bar. Is there any button/option to turn this off?
there's no way yet to clear and rearrange your quickbar slots. But "Alpha".
I don't quite get what you mean by this? If you meant placing skills in different slots you can by unlocking the quickbar (on the left of the bar, don't get why this is locked in the first place.)
Bug: You can unlock the skillbar and move an item "in between" two slots. This will remove it from the skill list, until the item's stack updates, without throwing it away.
Alternatively, move each of the grieving items to your backpack / pouch.