Strange GoodieHut Spawning

There is a strange thing about Goddie Huts.

It will not generate Goodie Huts with Spawn rating 1 or 2.

Starting Godie Huts has the Rating of 0.

And the next Level that will spawn is Level 3. With the Tech "Ancient Lore".

No matter what I#ve tried. Huts with Level 2 will not be generated.

I've set in Tech "Quests_Amarian" :

        <GameModifier>
            <ModType>Player</ModType>
            <Attribute>UpdateSpawnRating</Attribute>
            <StrVal>GOODIEHUT</StrVal>
            <Value></Value>
        </GameModifier>

But then, all Goodie Huts with Level 3 will spawn, but not Huts with Level 2. And when I researched "Ancient Lore" the Level 4 Goodie Huts apears. But my Questing Level is still always 1 Level below the World Level.

Is it a bug ?