Is it a bug?!?

When I go to the first village, an Indian one, I met a bunny girl and then I accepted the quest. Went to a place, beat the giant and went to the money, but the dragon killed me lots of times, my questions - which level I need to go there, and why when I jumped in the river the bunny girl stayed with me and I can't go back?

You can go back using Vanina's spell.

The next problems:
1. Which level I could beat the Thing of Blood? Because I use the thunder inflicting him 2300 damage twice and then I hit him for about 2000 damage with the wolf and Random. How much HP have he got? By the way I feel that it's Stanislas and I won't be rewarded(don't say if it is).

2. I think I didn't wrote to Luciana when I was in my house. Is that a problem? Won't she be there for me, can I still go back in part 2 and write to her?

3. The letter from an old woman? She told me it's for the Town Hall, nobody wanted it.

4. In Khomre, I think I killed all the fishes in the cave and I tryed the holes in the wall and the gorund in the both caves, I killed the king, but I can't complete the quest I think, but it's not in my quest book.

5. Is there any purpose of changing party leader? Some bonuses?

6. The daughter of the guy in Vaaluus, he said she is kidnapped etc. How can I save her?

7. Am I a dumb, because of having so much questions?

1. you're near success if you do the damage you do

2. you are forced to write to her otherwise u cannot reach ch3

3. actually the mailbox

4. am not sure

5. no, not in lf1

6. she is in the fort east of that forest between random's hut and valauus

I am finding these forums to be an invaluable resource.