Are stats supposed to be homogenized as you level up?

My creatures all seem to be only a few points from equally distributed stats, even at level 50.

Possibly weird interactions going on with nature mage traits? Display bug?

What monsters do you have, and have they been bred at all? Are you looking at the stats with artifacts altering any of the stats? There should be a gap between stats generally but each type of monster has their own base numbers, and some monsters have a very even spread across str/int/def/speed so they will naturally have very similar numbers regardless of level. Also note that there isn’t any randomization in stat gain per level (as far as I know) so if you have two of the exact same type of monster at the same level they’re going to be identical, if that is what you were talking about.