I am posting them all together this one time.
I also have a question on bug-reporting: is there a compilation of known issues somewhere?
The dragon eye is used for another question (go to all the dragon statues)
And I don't think there is a compilation but most of the things you have posted I have seen many times before.
I've seen 1, 5 & 8 a lot & 3 some. Quite annoying.
7 is because you have an adventurer's guild, which reduces cost of hiring. They really need to stop that from driving costs negative. In the meantime, burn it down.
If that were true, why could i still hire low-level heroes?