It's officially still Metrostation 14. http://www.metropolitan.bg/en/map/
My very limited experience in Sofia shows that usually the name of the metro station refers to what is to be found if you get off at the next one. :D I don't know why, maybe I am wrong, this is my internal feeling.
Since Mladost 3 is already taken by a future stop (that should not be on your way to the centre so I assumed it was not the one you are writing about) the name of your station should be something like Alexander Malinov? Is this the name of the boulevard where it is situated?