May someone enlighten my doubts of all the story gaps?

Magnamuz
MemberOvomorphJune 17, 20121137 Views23 RepliesI disliked ALL THE GAPS that at least I didn't see explained:
1) Why the engineers wanted to kill humans? I'm guessing is to go to live on earth? Their planet was dying? I don't know, nothing is explained.
2) If Weyland appears in Alien 3, were Aliens already exist, why is Weyland here as well? Was it really an android in Alien 3? There's no connection between franchises then? Don't know...
3) I have to understand that all the holograms were security cameras?........ :S
4) From what were the engineers running and dying in piles?
5) If those bugs were supposed to be sent to earth to kill humans, what was the plan then? Invade earth later with those things running around?
6) How all those civilizations saw those stars so far away? And which was the "invitation" if the engineers wanted to kill them all? So it was no invitation? So the engineers didn't teach them their location? SO HOW AND WHY THEN DID THEY DREW THAT STAR ALIGNMENT???
7) Other ships buried all over the place? WTF?
8) Why couldn't the engineers do all that plan that they had, from their home planet?
9) How the hell did the DNA matched 100% if the species is, at least, physically different? I don't share the same DNA with my own mother, and she's is my mother!
10) OK, I got to the supposition that the intro scene means the origin of the human raze evolving from the broken DNA in the water. But why did they did that? They were testing planets for life subsistence? Again, their planet was dying from something?
I DIDN'T UNDERSTAND #$%&!!!