hi vvlc,
yes you have a lot of questions, but i guess it's normal ..
We are family of 4 bound to Winnipeg and right now we are awaiting for the passport with visa stamped on it.
1. I think you need to submit again the original form IMM 5406, just put N/A or not applicable for the highlighted field that need to be fill out. Do try to read again "how to complete the forms", it was indicated their that you need to put N/A if it's not applicable with you and don't leave it blank.
2. Did you ask the US embassy if how will it take? Actually your case is almost same as mine,my husband was also asked to submit a police clearance from japan embassy with in 60days. And we thought that it will take 90 days to received it but we received the police clearance within 45 days. So just hope and pray, i'm pretty sure that the Canadian embassy already knows the timeline that they are giving.
3. In my case, we submitted a notarized photocopy of our diploma. And i guess it works..
4. Yes RPRF is same as landing fee.
5. Yes you should put the sticker outside the envelop for them to easily track your application.
I guess i answer your questions well. Those answers are based in my case. You can ask others if they do the same as mine.
Good luck!
candy