For point no. 3... i suppose u must have emailed your employer to give you a reference letter. If not, then please email them and when they reply you refusing to send u duties list, attach that email with your document. There was a discussion about this a long time back where a person got his CC charged even though he didnt have the duties list...but he had attached proof of emails as a conversation proving that company doesnt support such duties..and I think it will help ur application to add such proof's as well.
FYI, Even i have send this email to CIC because my company gave me just a short duties list