an interesting and an annoying bug

[Thrar]

the annoying one is known for ages i think; it sometimes happens that u get put back a day in game time. sux when u have to wait for something to happen.
what i could not figure out, when does this occur? and how to avoid? i also think that when some quests still appear in the journal after solved it has to do with this, when they r finished b4 they r given. solutions?

the interesting one might b very useful for some spells. here is what happened, dunno exactly how:
cernd with 5 memorized healings, chose spell, clicked on another char. then right-clicked on an unused spell button (to put it there for quick access) and chose the healing again. as he was still walking, he didnt cast so far, all 5 were still there. he healed, i clicked again for him to heal, and after that second healing there still were 4 healings left. i am not sure when exactly i clicked what, but in that order.
now with healing thats not the big deal, but with some good spells that r cast on another person, probably u can get a lot (infinite?) out of one memorized.
is this known? when/why does it happen?

[The Potter]

Completed quests

I've noticed that quests don't get moved to the completed side if you mess'em up. ie: Haer'Dalis: if you release him b4 you go to the theatre he will take the key and leave, never to be seen again...
You kill the dudes on the roof of the CC b4 the "book" quest.
You kill the red dragon b4 meeting with the prelate....
get the idea?