User registration issue

Hi,

I understand why a user account is created even though a user chooses not to create an account. My issue is that if a user chooses not to create an account and then returns to buy another product, they must enter a password if they're using the same email address. This is causing problems for our customers and also creates another step for them. They have to be notified that they must send a password reminder if they've purchased at the store before, even if they didn't create an account.

Any workarounds for this?

Thanks,

Quinn