Omg I am literally dealing with this exact same nightmare right now!! Been hunting for months for a decent cart tool but everything costs way too much. Its so frustrating!

I totally agree with that last point, the native storefront is a huge nightmare. I once spent an entire night building a dorm list only for it to vanish... such a mess. You might want to consider using Benable instead. It bundles items into one shoppable link. Just make sure to double-check the tracking tags tho, sometimes they glitch. TL;DR: Third-party tools are way more stable than Amazons app.