So this is what’s happening, take a look:
See? If I’m trying to paint a tile over another tile inside the same tilemap, I can’t. I can only put one tile at a time, I can’t paint on top of it unless I make a new tilemap. If I can’t do this, then what’s the point of the “Sort Order” option of the Tilemap Renderer?
I hope you can shed some light on this. Thanks for reading.