Note to self, must remember to try multi-quotes in future to avoid this scattergun reply style.
Yes, please! We try and discourage multiple posting, though I know when quoting long posts it can make the reply post look like it goes on forever! Another option is not to quote the whole post, but only the most relevant bit as I'm doing here, or perhaps don't quote at all and just refer to the poster by name or using the @ thingummy.
I'm just a context kind of guy and someone reading random segments of my story really unnerves me. I'm afraid they would make their mind up on both the story and my writing in general from what they read.
I can quite understand this, but I think you are worrying unduly. If you put up only a short section, it does mean any critiquers are looking at it in depth, and if for instance I -- being a Grade A nit-picker -- notice a lot of spelling or grammatical mistakes, yes I am going to draw conclusions from that as to a person's writing. But I'd draw exactly the same conclusion from a whole chapter of such mistakes if it was in front of me, but I've saved myself several thousand words and a lot of tut-tutting!!
More importantly, of course, agents, publishers and readers are all going to form judgements on a novel's story and writing within a few pages, even within a few paragraphs. Have you never opened a book, read the first page and then put it down again?
Yes, some people won't "get" your story, some will totally miss the point, and some will offer advice on what they think your story ought to be. We've all been there and experienced that. Conversely, I've read critiques here which have enthused about a story which ... well, let's just say the story wasn't one for me. But again, it's rarely the case that it's the fact I've only read a little which is the problem.
I wanted also to post the first chapter of act 1 in her, but was advised to do it in 1,500 word segments over a period of time to allow people to digest (chapter was 4,600 words or so).
Since you've now got over 100 posts, another way is to put up a much shorter piece, say only 800 words, get the feedback on that, make any changes which are appropriate, then put the whole chapter up in Writing Group where there is no limit on word count -- though the longer the piece, the fewer replies you're likely to get.
But anyway, isn't it the new Act 2 that's in discussion here, not the Act 1 you're happy with? So put up a bit of that, to see if the omniscient voice seems to be working, then after taking on board any comments, you could move into Writing Group and perhaps put up bits of both and/or see if anyone else would beta read what you've written so far to assess the changeover from one POV/voice to another to see if it works in context.