no registration doesnt allow customers order again

I use 'no registration' for the login/registration options in Hikashop, so customer can order fast by saving there address and that's it. I thought it works great, but I found one mayor problem: when a customer wants to order again, he can't use the same emailadres as he used with the first order. I first have to delete the customer in the backend of hikashop. So no customer can order again without contacting me about the problem.
Also, no error message is given when the customer wants to save there address in the checkoutprogress... You're just stuck on the checkout and don't get a next button because the address won't save.

I started having this issue when I installed version 2.1.1, but it was fixed in later versions of that release (I installed a fixed version of 2.1.1). Which version do you have? Re-installing 2.1.1 or the latest upgrade to 2.1.2 may fix this perhaps?

Thank you! Updating to the latest version did fix my problem!