My question list regarding the prequels.

First my stance is that I love Prometheus but hate Covenant will all my heart. Many of them are not important to the story but they bug me. But let's begin:

1. Was dr Shaw an archaeologist, was she mentioned as such? Because she knew how to operate the instruments in the science lab and knew about the very rare medical pod was not she a medical doctor of kinds. If so repairing David's body was not uphold Hippocrates' Oath and as such accepting as more than a tool?

2. In 2012, I saw Prometheus as being marketed as a movie in the same universe as Alien, but was under a wrong impression. When did it become a prequel trilogy? Or was it all along?

3. How old was David by the time of Covenant? 50-60(judging on the age of Wayland)? Walter was no more than let's say 10 (probably built after the Prometheus mission launch). So why in the cosmic do they look alike? And the bugs in the programming where found after more than 40 years, or Wayland and Vickers would have gone with a fault synth to Lv-whatever? And if the issues were found wouldn't the exterior of the synth be the first to be changed to reassure the clients?

4. In the faux disclaimer of Meet Walter there is a part about losing the rights to your DNA if you fail to pay for you synth if I saw it correctly. Is there DNA used in Synth? Who's was used for David?

5.In the First scene of Covenant, how in the Hell did David draw the conclusion that he is immortal, or for that matter how did he know what death is? How many generations of synths were there before him? Were they still alive?

For me 3 and 5 smell terribly as retcon. David was made the sole protagonist only in covenant, as evidenced in 2012 RS interviews, where he talked about the horrific things she (Shaw would find on Paradise, well she never reach there alive).

6. How in the hell did know about the John Denver song? In Prometheus, when Janek plays that stupid musical instrument (owned once if I call correctly by Greg Lake of Emerson, Lake, and Palmer) in front Vickers and tells about the owner is has not the any clue about who that was. Is it Covenant scene only there for artistic reasons?

7. How can people like David in spite of his overt nazism?

Sorry for the wasted time, but maybe you can shed a light on some of them.