Path of Exile has a chance to have a Master von vkmoons Blog

I realize that the manifesto indicated that "players have a considerable chance of finding either a Breach or Abyss in their map."

Instead of saying "and" or "and/or". However, based on the mechanics of this league, both Breaches AND Abysses were possible in the same map.

So unless GGG changes that, I think each POE Trade map will still have the possibility of having both.

Just like before this league, each map a chance to have a Master AND a Breach AND a Labyrinth trial...

Each of those have their own Cheap POE Orbs individual percentage chance to spawn and while some maps have none, it's not uncommon to have more than one on the same map.

It will be interesting to see how it does work.