I thought they were all correct, I will check them just to be sure!
Oh you meant just that, I see now. Just like on the picture: lower the red blocks and then just walk around the building and enter from the entrance below.
Yes there is a limit but that is 10. Everything upp to 10 different objectives per quest works.
The demon would be in the beginning forest and the entry would be in Demon Hunt Part 1, I will look into your save file.
I am currently working on it. In version 0.9 there will be a new questline where you can finish all the hunting quests and get rewards. It will also fix all wrongly displayed quests objectives.