Hello,
Issue with the number of pages on the shop page was related to your filter settings https://prnt.sc/1s1v7nc I removed that and it displays the number of products that you set in Theme Options > WooCommerce > Shop > Product page layout.
Checked the shop page and don’t see any issue with the sidebar https://gyazo.com/5bb446341d7b54c36b8ab683ca938eeb
Regards