Solution:
We spoke with a PayPal Technician (Shawn) who works in the “Integration Department.”
He stated that there IS NO NEED to confirm the Sandbox account holder’s (live) email. Sandbox will work without confirming the live email.
The catch is …
When testing your website using PayPal in Sandbox mode, DO NOT use a live email to make a payment. Use instead the Sandbox (test) emails assigned to your account. The test emails can be found as follows:
(1) Log into your Sandbox account at Log in to your PayPal account
(2) Click on “Developer” at the top of the screen.
(3) Click on your username at the top-right section of the screen and select “My Account.” You may have to login again.
(4) On the next screen (left side), click on Sandbox “Accounts”
(5) After you click on Sandbox “Accounts”, a list of your Sandbox test emails will be displayed.
(6) Next to each test email, under “Manage Accounts”, click on the three dots, then “View/Edit Account” for the information you need for testing.
That’s it! Hope we didn’t confused anybody.
To ensure no time is wasted in the future on this icky issue, Shawn (PayPal Technician) agreed to submit a Sandbox website change request to accomplish what you see below (or similar). Let’s hope it happens 
Happy Testing!