Hello,
1) Either go to Plugins > disable WooCommerce Infinite Scroll and Ajax Pagination plugin or set correct selectors according to theme docs https://xstore.helpscoutdocs.com/article/65-woocommerce-infinite-scroll-and-ajax-pagination-settings
2) To change Custom Ordering, go to Products > click Sorting > drag and drop the product rows to reorder them – http://prntscr.com/pxgdsk
Regards