Hello, I must add to this, to my understanding we need to click a second time to select a boundary loop.
and its true for the outside of this subdivided plane: 
However, I removed a face.
And for some reason this effects the nearby edge loops??
All the edges and vertices are intact, so why does it effect selecting the straight loop?
Also I just have to alt click once for the missing face to select them, but this isn’t really a edge loop right?
I just cant tell, it has 4 vertices, with 4 edges for each one, but I assumed it always tried to select the straight edges, not 90deg ones.