Problems with google account registration

I have received a few emails that BB followers have registered but their comments are not being posted.  
I asked that they send me a comment saying “Chivis this is a test”
Still not receiving the test comment.
I have asked that if this happens to delete the account and create an email to be used just for the google account.
That has not worked either.
I am at a loss as to what is happening. If this is happening to you please send me an email.  I would like to get an idea of how many times this is occurring.
Another issue is users thinking their email address is shown.  Only you see the email address no one else.  There has never been a case in my 8 years as blog administrator that an email address appears.  Clearly we would not post something like that.
Thank you!!