well, this may depend on whether the original visa was actually expired already or not. The FAM says that a reissue before the expiry of the original can use the originally allocated visa number (see below) in which case they would not have needed a reallocated visa. Unless anyone actually knows the family to determine the exact circumstances, i don’t know that we can definitively conclude anything?
I can’t determine from the way it’s worded below if a new number is needed if the visa has actually expired already - as the opening sentence included “was unable to use”. Any insight on that?
9 FAM 504.10-5(A) (U) Issuing Replacement Visa During Validity of Original Visa
(CT:VISA-411; 07-20-2017)
a. (U) If you are satisfied that an applicant will be or was unable to use an immigrant visa (IV) during its validity period because of reasons beyond the applicant’s control and for which the applicant is not responsible then you may issue a replacement visa with the originally allocated visa number within the same fiscal year even though the visa has not yet expired. You should recall and cancel the originally-issued visa and collect once again the appropriate IV application processing fee (including the Diversity Visa Lottery Fee for a DV applicant), unless the applicant was unable to use the visa as a result of action by the U.S. Government over which the alien had no control and for which the alien was not responsible.