Artists won't stay followed

[azazelblake]

I don't know if there's a limit to the number of artists you casn follow (on a free account), but whenever i try to follow an artist it highlights the 'follow' button as if i did it sucessfully, but when i go to the artist later, it the follow button will be unhiglighted again. For some reason it only happens to some artists, but some of them are artist that I know I've been following for a while, they just won't stay followed. Does this have to do with something like a followed artist limit?