After Signup and After Checkout

I have had two different people so far share with me odd things about where they were brought to after signing up.

I’ve tested it and it seems that it works fine for me. One person said it brought them to the homepage after checkout (instead of the Payment Confirmation) page (they used a discount code).

This reminded me of a few weeks ago when, prior to making a lot of changes, someone shared that after signup (their listing was a free package) they were brought to a search page that was searching for their name and showed no results.

So, where are all the settings for each scenario? I know UsersWP has a setting for after registering, in which case I have it going to the add listing page I created.

Is there somewhere I set it so the user is directed to their listing (or the preview your listing page) after checkout?