Fix WIX Cart Glitch

When any visitor clicks Add to Cart on my WIX store (https://www.cyfrowyminimalista.org/product-page/konsultacje-rozwojowe), the same product is added every time, no matter which item or sub-page they are on. I suspect the fault sits in the product page configuration because I work with the standard WIX setup—no custom code or third-party apps are installed. The trouble began right after I updated several product pages, so the recent edits may have broken a setting or link reference.

What I need from you: locate the exact misconfiguration that forces the cart to pull a single SKU, correct it, and confirm that every product now adds its own listing properly on both desktop and mobile. A short hand-off note explaining what was wrong and how you fixed it will help me keep things healthy going forward.

This is a straightforward, one-off task at a fixed price. Once the cart behaves normally and I can replicate the fix across similar pages, the job is complete.