Ok, it may be the case, but sure not 'for whatever reason'!, but to the extent as allowed by law for cross-chargeability in INA 202 (b) #1-4.
(OP better take a copy of that with you to the intvw)
OP has the options of correct the eDV mistake or claim 202(b) 2 or 4.
#4 may be cumbersome as I remember few ppl during last cpl years faced.
#2 is straight forward. Then both will be considered as 'principle apps.' (but only the main winner for DV basic reqmts), and both need to enter to US together.
Also restrictions like say spouse fail medicals, or sec. chks then no benefits for the DV winner. etc.
Best!