Payment Wizard has created unwanted boxes

This is best explained with the screenshot below.  The unwanted boxes are underlined in red.  How can I remove them please.  It occured after I had edited the prices.

Select your payment field, click on the wand icon, and click on your products, then remove the "Undefined" word from the "Image URL (Optional)" box, example:

Let us know if you need more help, we will be glad to assist you.

Super job - thank you. 

Just a minor point - Your video in explanation is clever but a bit small and definitely runs too fast.  Nevertheless all resolved and thank you again.

You are welcome! I see what you mean, thanks for the feedback, I will try with screenshots next time. Open a new thread if you need anything else, we will be glad to assist you.