Payhip store Unlisted Product Gotcha -- It being too simplistic or am I Overcomplicating?

 As part of another blogging business and working on an actual digital publishing business, I came across (that is, baffled myself) using the Payhip Store Builder.

If you have an "Unlisted" product on the product screen and go away and forget it, you may have some heartbreak later on until you rediscover what you had forgotten.

Overall so far, I find the Payhip Store Builder a bit stifling, if I'm going to make howlers like that I'd like them to be complicated situations where I got into the deep doo-doo myself, not just mis-applying some radio button ...