HELP--Guest checkout Problem

This domain name sharkhide.com/cart

I installed the guest checkout and it works great...Had it up for awhile, well someone just noticed that if you add something to the cart and then go through the process and once you get to the payment page,,if you click on "change shipping address" or "change billing address" it will show you other customers contact info (near the bottom)....not good, I have no idea how to fix this...any help would be appreciated

thanks

You appear to have made your own method of creating an account and have some how set it up incorrectly so that it is not generating a unique customers_id for the tables:
customers
customers_info

and creating its own record for the table
address_book

So, it appears all customers are given the same customers_id and obtaining all of the generated address_book records ...

Is there a reason you made a new no_login page vs use the original methods for the login and create_account pages?

Customer wanted (demanded). It was a script I installed a while back, cohoa guest checkout- something like that. I just edited the page to get rid of the signup and log in page so the only option is to checkout without an account. It has perfect for a while until this issue came up. If there a way to make it so past addresses, or customers past addresses are not showed when someone clicks those buttons?

You have some logic wrong in building the tables ... unfortunately, I have no idea what you hacked into or out of the code that this is happening ...