It's not alien origin, it came from earth. Maybe it's post-terrestrial ?
2. That's your own interpretation of the word. The actual definition of extraterrestrial life is life that did not originate on earth.
While I would not consider something that evolved on a space station around Earth as extraterrestrial, this seems a bit restrictive. This would rule out any life evolving from Earth material on Mars brought by a rover as extraterrestrial even million years later. Also, if we discovered life came from an asteroid, we might have to consider ourselves as extraterrestrial with such a definition.
(though I would not know how to define the word)