I've been playing it a lot today (today is my first day playing it :D)

But I have a specific villager and he is a builder, he's an adept builder for a while. He has been doing his work. But the level wont go up. I dont see any progress in his skill level. But there is progress for what he is working on.

Could someone please explain what is wrong, because I really need the skill level to go up to unlock some things. And that is probably my only hope for a while to increase skill level.

THANK YOU!