Not fair!!!

Check your zone, you most likely had the opportunity to set 3 but didnt.
You can check :

The same has happened to me and I beat his first squad and the game restarted! The victory didn't register but I lost the squad I attacked with.

I messed up by only setting 2, only realised when I saw he had 3. My bad

Something is wrong
I had 2 spots to fill, when the attack phase started raised to 3 but not an extra spot on the map...

If I could have set three defensive teams, why did only two circles show up graphically? That’s confusing and bogus.

There was conversation about the visual glitch last GA. Didn't have the same issue then?

I made the same mistake too. It's annoying that the visual is incorrect and now I'm at a huge disadvantage. Oh well, lesson learned.

Not that I noticed...

I had same. I set up 2 defenses. Then now i looked and see it says 2/3 defenses set. I m not sure if it was my fault or not this mistake
My opponent set 3/3.

I lost without starting

I made the same mistake. I assumed there were only 2 spots to fill based on the visual