My abantecart install has been running just fine for 7 months now, out of the blue the last 3 days I have had customers place an order and choose guest checkout upon completing guest checkout I receive a copy of the email showing their name/address however when I login to my admin control panel and look at "All orders" the customers order # has a different name attached to it, the guest orders are randomly being assigned to existing customer accounts, and the confirmation email is sent to the existing customer email not the Guest order email, see the screenshots for an example.
Customer Tony Balda checked out as a guest however the email was sent to an existing customer "Ki Yoon"
Upon further troubleshooting it appears that the website is leaving customers logged in and when a new customer searches for our page on google and then clicks the link it takes them to our site but has them logged into whomever was the last account to login
Could this be a cache issue?