- is correct. 2. I’m not sure about.
But there is an unfortunate edge case - if the face is created on the ground plane, then the face will be orientated down. I believe this was a decision made in the early days of Google SketchUp, or maybe predating Google, where it was assumed that any geometry created on the ground plane would then be pulled upwards.
Imported vertices cannot be entered simultaneously, they must be added sequentially. So they will always be added in the same order as specified in your file.