Select-Field select between 2 options?

HELP.
I have a select-field input option on my site - it has long had only one option/choice. Yesterday I added a second option/choice and now only the first option (whichever I put in default position) is the only one that my PayPal integration/button recognizes?

Not trying to do multiple select - just choose single option allowed.


Here is my site Read-Only: LINK
(how to share your site Read-Only link)