Just RNG man. There 6 commons in Jin 1 Treasure. GNW Shino,Neji,Kiba,Kankuro, Make Out Paradise Shikamaru, and then Yugito.

So when you pull you have a 1 in 6 chance or a 17% chance of pulling her. So chances are you are not, so it isn't uncommon to not pull her often.

Yugito is a common, and there are a total of 6 commons in the treasure. So your chances of pulling her is 1/6, so it isnt too high.