As previously said, overlapping dates are mine. You do well to list it as you have done.
I would limit myself to the examples they have given - student, employment/worker, refugee, permanent residence or citizenship. A tourist status is not an immigration or citizenship status for these purposes. For instance, to study in the US you need a student visa, so that would be something you would list in this table.
From the
application guide:
Results from a third-party language test
NOTE: If you did the test in the past for immigration or citizenship purposes, we will accept the results even if it has expired.
I'd think your answer to this question doesn't matter. Personally I would put no if I didn't live in Quebec. Keep in mind your answer will not affect your citizenship application but do answer it.
Most of these fields should disappear once you select that it doesn't apply to you (though they reappear once you print). I just left them empty and I am sure it will be fine.
The calculator asks you for the date you left Canada and the date you returned to Canada. For each field it specifies what must be inputted in the instructions.