Hello,
My pleasure!
1) Try to disable all the third-party plugins, that do not come bundled with our theme, and check how it works then.
2) You can filter by category and then sort products http://prntscr.com/pxps9i Via screen option you can set Number of items per page (do not set more than 100 per page).
Sorting of products comes from WooCommerce plugin, if you have any other question, it would be better to contact the support of WC.
Regards