All agreed with the fixed points, obviously
Things that occur to me - Laverne could be an adult Nami knew, rather than just the officer for the area, the fact they refer to her by her first name suggests more than just the first available officer.
Agreed that they lived somewhere different to now. I can't remember if Nami finished at the highschool out west, I'm assuming so as both of them are outsiders at the uni. Presumably that means that Nami has been going to that school some time in the last 5 years before college. It's suggested that the three of them have been a tight unit living together. If the school was 3 hours away, that'd mean 6 hours of the day spent on buses. Maybe that's why they're poor 
My point is the house in the flashbacks either has to be close enough (~ 2 hours or so) that the commute to the hospital is realistic for someone who works with people in accidents (sure, as a specialist, maybe not directly in ER, but close enough to it to stop the ER people from amputating), OR Noji didn't work at the hospital while out west because it was too far. That would mean Scarlet was working with her once Noji returned to Wollust. I'm assuming Noji was working at the hospital the whole time though, it's not a often a career you start into late, and given she feels trapped in a rut that it's too late for her to advance further than the hospital - not the kind of thought you'd have about a job you've been in for 5 years or less.
The distance makes me think either the old house was between where they are now and the cabin close enough to be plausible, or Noji wan't working in the hospital until they moved back. Nika's accident was treated in Wollust though and there's the bus ride early on where they talk about a local spot they used to know at (Obama's Kebab) that has been closed for more than a year - presumably Nika remembers it from before his accident. Also, the lake is seen as a place they used to hang out a lot at, several years ago (again presumably from before his accident). These things make me think more like they did live in outer suburbs, and the cabin being so far away is the oddity. The cabin could easily be a holiday cabin of someone they knew.
Anyway, I'm wasting your time over a very pedantic point that's most likely a continuity error, I'll stop now 
Regarding Officer Laverne - I thought she was a Police Officer known to Nami/Nika/Nojiko, hence the use of her first name (but that could be the original, pre-rework SG talking).
Nika also mentions her to Bella: "Then Jane drove us home... and I can't remember more... I must've suppressed it."
Well, there's still many things that either don't make sense yet or don't add up. Time will tell how well they get resolved.
I have no idea how Nojiko's employment reconciles with her possibly living six hours away from their current city.
To me it looks like Noji hid the "roommates" for a long time until it was safe for them to show up and claim their heritage. They lived on the west, went to "Tropical something" school, and now they've moved here to Wollust. And I don’t remember exactly if there was any mention of why they chose ZPR among all the possible colleges? I suspect Noji did it. Although Nia is also here and studied at the same school as Nika, Nami and Summer. So perhaps it was just a coincidence that they all ended up in the ZPR.
Yeah, Nia, Nika, and Nami all attended Tropics High School in the west, along with Summer.
Thus, they're the odd fish at ZPR since all the other major ZPR student characters attended more local schools together.
There is no mention of Nika or Nami choosing ZPR, but dialogues infer it wasn't their choice, so you're likely right, Nojiko selected it for them.
(Nika:
"Do you know anything about the college?" Nami:
"Except that we didn't even get the chance to look around for other colleges, no. But I checked some forums and it's a really good college... Even though most of them were complaining about not getting accepted.")
I don't know why Nojiko is still trying so f--king hard to shield them from their past rather than just telling them?
Robin's mom also clearly knows more than she says. In the scene where Katie meets Nika, it is Charlie who holds Najiko back. Well, it seems to me that it was not without reason that she had such a negative attitude towards Nika all the time.
However, it seems to me that there is one underrated character who has a much more important role than we can imagine: Miss Marla. There is too little information to make assumptions yet, but one thing I am sure of is that she is one of the key characters in the story. There is a not a small chance that she knew Najiko before meeting Amber, Marla directly says that Nika is part of her problems, there is a possibility that she goes to Amber and cries because of Nika,when Nika was locked up by Zara and Nadya, either Bella or for some reason Marla freed him. Sasha (one of the key characters) turns not even to Nami, but specifically to Marla. She somehow knows that it is Marla who will drop everything and run to save Nika.But it’s too early to connect dots. The only other interesting thing is that she has known Bella since she was 12 years old (the approximate time of Summer’s disappearance).
There seems to be several characters who know what's going on with Nika and Nami, just not Nika and Nami themselves. It's annoying
