I just started the game and i enjoyed it

In Aleroth, when i lvld up my sword spec skill , it became not 1 lvl, but 2 lvl. So now i m lvl 2 warrior, with 2 points in sword spec, and ye, it requiers lvl 13 now for 3 lvl,

Is this a bug? How did i manage to have 2 points in swords while still being lvl 2 character?

I tried to make the same thing with axes, but was unable too.

What did i do to get this?

I reviewed my last characters, and they all have 2 points in swords and 2 points in overall mastery (dont remember the name) while still being below lvl 7.

But somehow i m unable to do this again :D All my new chars have appropriate 1 point in swords when i lvl it up.

What part did i miss or this is just a bug? Playing GOG version.