Having issues getting the Archive Posts Widget to display all the links in pagination? Try setting the Page Limit to blank. You may think it’s related to number of results or posts per page. What it does is that sets a MAX number of pages to display in the pagination. So, at the end, it will display the minimum between the Page Limit and the number of real pages.
For example: if your archive would normally display 42 pages (because you are displaying 10 posts per page and you have 415 results), but your page limit is 10. It will only display 10 pages (100 results). But if your Page Limit is 1000, it will display 42 pages (that is the minimum).