As Dorin says in his signature: A computer program does what you tell it to do, not what you want it to do.
Said another way, I think it’s time for you to use Sweet Home 3D as it is.
Most of its behavior was inspired from other software and I won’t change it just because you expected something else. If the provided documents doesn’t work for you, feel free to write your guide. If its quality is good, I’ll be pleased to reference it in Documents page.