Yeah, I can work on adding pagination for you. And, if you let me to choose how it should work, it would be like the already exemplified. Here's a screenshot on two aspects you should focus from my previous example:
See how it says 756 on the side? And how big the scroll bar button is? And how fast that page loads? There's a great dynamic pagination happening there. If you scroll down or up, it will automatically load the other posts, be it on desktop or mobile. Very responsive.
Old pagination method would split that into 75 pages with 10 items each, or something on these lines and page loading time would be worse because then you have to load a full page for each page instead of just the contents, like it's done with this dynamic approach.
Now, this does come with 1 disadvantage... It makes harder to print. An easy solution for that is offering a "print" button.
And I was suggesting you could add yourself the code to make "the margins on all pages to be the same width". That's simple enough. Here's how you could do it: http://help.squarespace.com/guides/using-the-css-editor
And you could have found that link by googling for "squarespace custom css", like I did.