I have a multisite and each blog is using Membership 2. But the registration isn't very smooth for users who already registered on another blog. For example... A users registers on blog1.mysite.com and then finds blog2.mysite.com and decides to register... They get an error that someone with their email is already registered... They think... "No I didn't..." How can we make this smoother. Can't we just add that user to the blog instead of giving an error?