Dragons between the Fourth World and the Sixth Options

[Fatum]

(I ask your forgiveness if any of the questions I'm about to ask have been discussed already, can't really find them).
So, I've been reading the (unprinted) Earthdawn book on the dragons, and I have a few questions.

1) The Great Dragon to write the first part of the book, Vasdenjas, angrily denies that wyvers are adolescent dragons, when the scribe points out that the description of the latter (feral reptiles with a single pair of legs) fits the former perfectly. Has it been established anywhere if Vasdenjas was lying (I'd say it's very possible minding that he lied that dragons can't produce offspring paring with metahumans)?

2) The lifecycle of a dragon is described as follows: hatchling (200 years), adolescent (50 to 100), adult (2000), great. Does that mean that no hatchling born in the Sixth World has matured? Similarly, does that mean that any adult dragons were born well into the Forth World, and hibernated through a downcycle?

3) Dragons of each region are said to have a Loremaster in the Fourth Era. Is that to mean that the Sixth had dragon globalization happen, with memory crystals from around the world brought together and entrusted to first Dunkelzahn and later others?

4) How can dragonic lifecycle function in the Sixth World?
A hatchling requires two hundred years to mature into an adolescent, during that time he can be unstable and dangerous. While I understand that in a primitive society like Barsaive hatchlings could remain unseen, in the Sixth World next to every pair of eyes has a camera built in: where are the hatchlings?
An adolescent spends fifty to a hundred years a bestial killer. Unless wyverns are dragons, where are the adolescents, and how do they survive?
Each adult dragon requires a lair, and they're said to be extremely territorial. Given that the least populated places are already taken up by the Greats, where do the adult dragons establish their lairs, and how do they survive given that they can't really establish hunting grounds?

5) Why are the dragons so comfortable with metahuman civilization? I mean, imagine bringing a medieval peasant into today's world, what a shock that'd be for him; and dragons spent dozens to hundreds of human lifetimes in a society with a largely medieval tech level. Why don't they refer to metahumans as Namegivers, for that matter, or use Fourth World magical terminology? Why has none of them mentioned the Namegiver races that didn't make it into the Sixth World?

6) What's with Alamais and Sirrurg? If they're so bestial and willing to dine on metahumans as Storm Front paints them to be, why didn't they satisfy that need in the Fourth World (dying well before reaching the status of Greats, most likely)? Is there a reason Lofwyr did not issue a formal challenge to Alamais, nor perform a Rite of Challenge with him at all, instead using pawns for an intraspecies conflict? Why did he challenge Alamais at all, for that matter? Why were there no proper Rites of Death, such as burning the body?