Can somebody help me understand season 1?

Hello, I’m a first time watcher and I just finished season one. I’m not a native English speaker so I had a hard time understanding some of the dialogue. There’s a couple of questions i have that haven’t been answered (or went over my head) and I hope somebody can answer them without spoiling too much of season two.

How is it possible that William is the man in black? Were all of his scenes flashbacks ? It seemed like man in blacks story and Williams story played out at the same time.

What happened to the security officer who got ambushed by the ghost nation? He got tackled and not seen again if I remember correctly.

What happened to Logan and what was the significance of the nitro-filled corpses?

Why couldn’t the technician who helped the brothel mistress escape not simply shut her down? Did he want them to escape?

How did no one notice that Bernard was in fact a robot? People must’ve recognized him when he appeared looking exactly like Mr Ford’s partner.I absolutely loved that twist and am quite sympathetic to him, Hope his story plays out well. Thank you