Two sentences from an adapted text... :)

[Tamara]

Hi

My homework is to write an essay – actually, it should be some kind of a review of one of the stories from 'The Fruitcake Special and other stories' by Frank Brennan.
I'm given an adapted version (for English learners), the book published by Cambridge University Press.

There are some sentences that make me a bit confused
(even though I’m sure they are correct from any reasonable - academic - point of view ).

Just two of them:

1. There were all kind of people around whose job it was to make sure that everything worked properly.

If I constructed the sentence I would definitely omit it. Would I make a mistake

2. In her heart, though, she did not really care what happened to her, not since her dear Dally had gone.

I don’t understand... why not is used here not just since

(Just in case, I’ll give you a fragment of the introduction to the story:

"…once Uncle Dalton had died, I think a part of Aunt Molly died too. She was still a hard worker and remained a good mother to Winston and Clement. <…> But the cheerfulness <…> had gone. It was as if all her cheerfulness had died with Uncle Dalton, her 'dear Dally'.")
_________________
It’s impossible to learn swimming without entering the water…

[Conchita]

1. There were all kind of people around whose job it was to make sure that everything worked properly.

First of all, I'd write: 'There were all kinds of people around, ...

The pronoun 'it' can be omitted in this sentence. Look at it this way:

It was their job to... = ... whose job it was to...

Their job was to... = ... whose job was to...

2. In her heart, though, she did not really care what happened to her, not since her dear Dally had gone.

The adverb 'not' here can be omitted, but it is used for emphasis: she did not really care what happened to her, especially not since her dear Dally had gone.

[Tamara]

[Tom]

Interesting sentences!

In her heart, though, she did not really care what happened to her, not since her dear Dally had gone.

I would like to know the use of the comma here in the sentence. Is it coming because of the addition of "not"? Please see below: Is the following sentence OK without comma?

In her heart, though, she did not really care what happened to herat since her dear Dally had gone.

Tom