Can't get started because of broken "automatically add words".
Please note that the "Paging moves to known" option, if enabled, will make blue words Known (white) when you switch pages.
In your case, you said blue words are saved in Vocabulary (became yellow), so the option you want to disable is "Auto LingQ creation" under the same settings.
I indeed thought that white words were considered vocabulary words. My blue words become white when paging, even if the auto-box is deselected.
Are you sure that you have "Paging moves to known" disabled? Can you please give it another try? It really shouldn't move blue words to known if you have it disabled, except if you complete a lesson which moves all blue words to known.
Yes, it is definitely unchecked. Fresh page and everything.
Here's an idea. Does paging automatically complete a lesson if it's the last page? This happens with things that are only one page. I thought clicking the page arrow would take me out of a lesson without completing it. So I guess in essence, I'm looking for a way to do lessons partially without completing them.
You will see the complete lesson page once when you compete a lesson, if you are on the last page but do not proceed to complete it, blue words won't be moved to known.