I just transfered my primary switch account to my new switch, I own BotW + dlc (all digital), skyrim, db xenoverse 2, mario arcade etc. all digital.
My old switch I have my two secondary accounts.
I went to dl hulu on my old switch and in my redownload section of the Eshop it said “Breath of the Wild DLC” and I downloaded it.
I only bought the BotW dlc twice and both on my primary acct on the Wii U and Switch....
My primary account is not on the console anymore BUT I can play this content on a different switch. But not only that but I was given the option to redownload on an account I had never purchassd this on.
Must be a bug.