Cute baby doll
She's still black and tan. Usually when a black dog starts fading in colour, there's a vitamin or mineral missing from their diet, that causes the melatonin to not produce the colour properly. What kind of puppy food is she on, that may be your first culprit?
She may be a medium haired pup - some parts will look long haired and other parts will look smooth, though she would still be classed as a long hair.