Happened with my SPG. They had to merge my accounts.
yeah you'll probably have to merge the account through delta also, my dad has two amex skymiles (personal and delta) it's literally been a month and I'm still trying to get them merged
Yeah, I wound up with two accounts due to my own error, but it was easy enough to merge the two on Delta's site. It took less than 24 hours, certainly not a month.