In 1.0.9 notes, this issue is not mentioned, as devs are supposedly unaware.
The exp you gain is a fraction of what the game tells it should give you. This results in extremely slow leveling.
Another issue is, the game says you gain attribute per 3 levels, you get 1 per 4 instead.
Your official starting attributes are 2.
Your skill caps start at 10, with 2 attributes. When you put an additional attribute point, it gives 10 skill cap. What that means is that 2 attribute points are an actual zero.
Lets say you put everything to 1 skill field.
You have 8 attribute points...