This is normal. The amount of HP and MP players get per level is randomized. This means that at higher levels there might be a difference between 2 players of the same class and with the same items.

Uhm, this is normal on beta or official servers? So far I know it gives 40 hp and 0,9 defence each Vit point

This is normal everywhere. It is not the amount you get from Vitality Point that is randomized but the amount you get per level - which is also reset.