In your personal history mention all the jobs u had even if u dont have proof but in work history only include the jobs that are going to give u points that u got invited for. And if want can explain in yor letter of interest y u excluded those jobs out of the work history part.
Unfortunately not they give you watever date is available for them and it take a weeks or months sometimes
but they say if u cant make the interview date they set contact them to reschedule a date that works for you.
Landing appointment is like ppr u can either get one or the other. When you get a landing appointment u get copr there on spot at the interview.when u get ppr u send your application to the respective vo to get copr depends what the send u.