snooper on "[Plugin: WooCommerce] Weird redirect from category to product page"

Hi folks

I have a very strange redirect issue going on at https://www.myhebrewbooks.com

If you select under the "BOOKS" menu - "Books by Dyonon", the link in the status bar looks fine (a valid category link), but when you click on it - it goes to some partial category link / partial product link, which of course throws a 404.

Same for the Books > Books by Magness option, but some of the category links there do in fact work. The menu is completely managed via the Appearance > Menus options.

Same issue on one of the sidebar links, which is also a category page.

We are using the "redirection" plugin by John Godley, but even when de-activated, this issue exists.

Would appreciate any help!

thanks!

https://wordpress.org/plugins/woocommerce/