Hey everybody!

I experienced something extremely strange today and I hope you guys can help me.

I started a new game, nearly got beheaded as usually and ran into the first tower. When Alduim broke through the wall I crouched, increased sneak to 16 and leveled up.
When I arrived at the Helgen-Castle, I equipped my sword, killed the first stormcloack with flame and leveled destruction. I killed the second one with my sword and leveled one-handed and reached level 3.
In the next room, where you can find the potions, i leveled up one-handed again by killing to enemies. And after I opened the first cage with miy lockpicks. I reached level 4.

That is no fun. I want to earn my level-ups.

Has anybody experienced the same and can help me?

Thanks in advance!

P.S.: I am playing the vanilla goty, no mods.