How can a Peasant have several EVO2 heros?

Since the arena update a few months ago there have been "AI teams" in arena sometimes. You can tell because they all have the following traits:

  1. the username "Guard".
  2. a random selection of double evo heroes.
  3. the heroes are always below level 200 (most double evo teams from a normal player will have all level 200 heroes).
  4. they have the nobility rank of Peasant.

I do not know why there are AI teams, or how often you will face them. I seem to face them more frequently after the weekly reset, so it probably has something to do with that.