Thanks buddy for reply, I have got your point. I will follow what you said.
Yes I have valid job offer also I have gained 600 points for arrange employment and I am currently working under LMO. All 3 letters are required/mandatory to upload as I am CEC applicant. Yes you are right they are pretty similar. I have got offer of employment and experience letter, it means I have 2 letters, there are 3 letters are required. Number 2 seems to me job offer letter.
I am confused about Number 1 & 3.
1. Employment Records - Reference Letter
3. Letter of Employment - No explanation
They both seems to me same. I think I can't upload same letter in 2 difference places.