Let's cover some basic first. The system track you through your LDS Account and the Membership Record Number (MRN) associated with it. If for some reason you have the wrong MRN on your account, that would explain things.
Try logging into the directory and click on "My Household". Make sure that is your household. Also try logging into ldsaccount.lds.org and check that the birth date is correct. Errors here would suggest the MRN on your account is really for someone else.
Last thing to check, get the MRN from the membership tab of ldsaccount.lds.org or from the directory. Compare that with the MRN the clerk has for you. One possibility (although fairly rare), is there's a duplicate membership record - you have two MRNs and only one got moved to the new ward. There's also a possibility that someone with a similar name and birthdate got moved into the new ward instead of you.
Have you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
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