Gotcha - looks like it's just seeing the paginated results as very near duplicates. If possible, you'd want to implement http://googlewebmastercentral.blogspot.com/2011/09/pagination-with-relnext-and-relprev.html which Google prescribes for paginated listings of results. Whether SquareSpace can do this or not is a question for them/their team. You may want to send a support request.
The good news is that these errors likely aren't causing big pains/problems for the search engines. It's best practice to fix them, of course, and Google may have a slightly easier time crawling and indexing all your stuff properly, but it likely isn't harming traffic actively.
Wish you the best!