Wandering horde 3 zombie bears, lvl24, day 10, GS38 -- intentional?

I looked through the xmls and I think I understand a bit more how this works...

gamestages.xml

<gamestage stage="38">
  <spawn group="ZombieAnimalsGroup" num="05" maxAlive="30" duration="09"/>
</gamestage>

entitygroups.xml

<entitygroup name="ZombieAnimalsGroup">
  <entity name="animalZombieDog"  prob="4"/>
  <entity name="animalZombieBear"/>
</entitygroup>

If I understand this right, the wandering horde at GS38 will spawn 5 enemies, each one has a 40% chance to spawn a dog, and if that check fails, it spawns a bear

 

I also noticed GS50, which is guaranteed to spawn 2 zombie bears

gamestages.xml

<gamestage stage="50">
  <spawn group="ZombieBearsGroup" num="02" maxAlive="30" duration="09"/>
</gamestage>

 

entitygroups.xml

<entitygroup name="ZombieBearsGroup">
  <entity name="animalZombieBear"/>
</entitygroup>

 

So if you are very very very unlucky, you could potentially get 5 zombie bears to spawn at GS38, which is harder than the wandering horde you would get at GS50 (seems unbalanced?)

 

If you want ideas to make it more balanced for GS38, maybe spawn vulture instead of bear, or increase probability of dogs?

Checking on this, thanks.