So whenever a player is close to another position, give him a new "label", so that coaches scouting those players realize he´s not a one dimensional guy.
If you can not tell that, maybe you should take time to learn more about the game..? It also depends quite a lot on what you want for your player types for certain tactics.
What about when you look at other teams players, as you cannot see their skills and stats can be misleading.
I do not see really what you are aiming at.
Anyway, also in RL, this "label" does not indicate what he could be good at, but in what positions he has actually played. if that would be the case here, I would agree on "mixing" labels.