Login issue -Want set up as Guest

-- url of the page with the problem -- : lapeercountyconcertchoir.com/index.php/c...out/step/step-1.html
-- HikaShop version -- : 2.6.1
-- HikaSerial version -- : 1.10.2
-- Joomla version -- : 3.5
-- PHP version -- : 5.6.19
(Note I had this part of this in the Hikserial section and was told to post it here)

I have used Hikashop for many years on another site and it works great.

I now have it installed on a Choir site and last year sold tickets to our concerts on line with just hikashop and the customer used the email as a ticket at the event. I want to make it a little more professional and just installed hikaserial.

My problem right now is when I try to test the checkout system - it says "the email is already in use". I had this problem on my other site and corrected it by using "no login" - I have attached a screenshot of the new setup. This problem seems to be new - last year before hikserial was installed I could purchase tickets using 'an email that is from a registered person". Now I cannot.

Ok - So I see 2 conditions:

1 - A Guest User (with no user login) can use the same email address as many times as he wants.
2 - A "registered user" must login to complete an order.


Question - Is there an easy way to show the email address in the checkout-address area. After the email address is entered, it is never visible again. (This may not be a problem with most people - I use a lot of different emails)