Member cannot update/edit their submission

I created user input forms on the page, and I linked them all to a database set to allow all the permissions to site members and site member authors except delete (I even allowed the delete permission to the site members once), with the dataset set to Read-Write.

But when I logged in to a member on the live site, I tried uploading files and updating the inputs, but they did not reflect in the collection/database at all. I tried several times but no luck.

What should I do now?