I don’t think I actually hold moral conceptions to a binary duality like this. Under the hood, moral considerations hold a value (and I consider that value to be determined by something like Friendly Utilitarianism).
This distinction does not try to draw a clear line, rather it serves to remind us that not all moral considerations are the same. Negative and positive morality are not isolated from each other. It’s possible that improving a positive moral consideration is worth the downside of making a negative moral consideration worse, as is aligned from standard utilitiarian thinking.