Are you sharing that email with anyone else? Is it possible you created another LDS Account using that email address? You might try logging out and then at the signup screen, use the "forgot username" and use the email option to see what other account might be associated with that email.
That also looks different than the screen I see. Try this link:
https://ldsaccount.lds.org/contactInformationHave you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
So we can better help you, please edit your
Profile to include your general location.