Stating the sequence of the wires doesn't help. The electrician would have simple put the cables in the first hole available in the box.
If you, as I believe you have said, have a 3-way switch in the house and a 3-way switch in the garage, that turns the porch light on and off, there must be a 3-wire cable (black, white, red wires) between the two switches. Since you only have one 3-wire cable that cable must be between the two switches. Therefore, part of the porch switching. Not part of the entry way light and outlets.
