What's wrong with Yahoo ? [I Yahoo]

I'm trying to sign up for another Yahoo account so I can get back on Reddit. Yahoo's saying i have multiple accounts when I only have 3 do they not know how to count 3 is not a lot. I'm afraid to unlinked this account I'm worried I might loose all my data from it and have to sign up again. What's going on with Yahoo ? Why do they say 3 is multiple accounts ?