- Maybe you don't want your EMail (GMail) address known by the current blog owner.
- Maybe the two EMail addresses are thoroughly tangled - you invite the second EMail address as a blog member but just don't get the email - even in "Bulk" or "Spam"! What to do?
- Maybe you opened the invitation email under one account, but were logged in to Blogger using the other account. This can happen if you execute the transfer, using just one browser.
Sometimes, having ignored one or two basic (to me) rules of Blogger account existence, you just can't send a membership invitation to a second Blogger account.