I would say that you just write your story, and then when it it finished, figure out what category it goes in, then put it there. I think you are more likely to irritate readers if you miscategorize a story, than if you try a diffeent genre. A few followes might choose not to read a specific story becasue it is in a specific category, or they might miss its existence entirely, but they are highly unlikely to unfollow you over it.