With my years of experience as a developer and my skillset focused on HTML, PHP, WooCommerce, and WordPress, I am confident in addressing your site's bugs and customization needs. The first issue you mentioned about the creation of Custom Post Type not linking correctly to WooCommerce products is a problem I've encountered before, and one I can easily diagnose and fix. Drawing on my extensive knowledge of Woocommerce and WordPress, I assure you that the "Create a Listing" form and "Buy Now" form functionality will be restored.
Regarding linking the Quantity Meta field to Woocommerce product Quantity field, creating a viable relationship between the two is something I've frequently handled while developing plugins for Woocommerce. It is important for these fields to work harmoniously for effective calculations related to purchasing using the "Buy Now" form. My familiarity with the platform will guarantee they do.
Lastly, the CSS issue on the Account page where only sections are clickable would be swiftly amended too. The "Create Listing" button getting stuck in hover color after opening in a new tab will also be resolved. My coding prowess combined with my attention to detail ensures not only expedient fixes but also long-lasting solutions. Let's get your Wordpress site running smoothly, together!