Secondary store page product issue / Imported products ends up in the wrong page

Hello. I was trying to set up a secondary store page for a product that I would like to keep hidden so I can only offer it via direct link to my customers. I followed instructions on a different post to create another page and keep that product in there, set up SEO settings to keep that page hidden, which worked exactly as I wanted to. However, I'm having an issue while importing products from Printful now. Now, new products after sync, goes into the secondary Store page I created for the product I wanted to hide. Instead of the main Store page that they used to appear after importing. Any idea on how to change which page they should appear/land? It's going to be a headache to move every single product to the main Store page one by one like this and I couldn't find a setting for it.. Providing an image of page section with notes to help pointing out the issue.

Any help will be appreciated.