Sumit,
I have total 10 years of experience, 5 years as network/systems admin, 1 year as Assistant Manager; Systems and 4 years as Manager; Systems. Applied in March 2008 and mentioned all my duties for the whole 10 years mentioning the NOC codes. My application has been accepted for processing. I have completed my medical and sent passports to CHC New Delhi as per their request. I am from India.
All you have to do is, mention all duties you have performed as a manager (0213) in details. Make sure those duties match well to the duties described for 0213. Do not copy “word to word” but always mention the "catch words". You can also mention duties you performed as a non-managerial employee in few words which I believe will make them understand that you have been gradually promoted to managerial level, which looks more reasonable. You may mention the required NOC code for the same which may not be included in the "38 occupation list". I did the same. But remember, please write your managerial duties in details.
Your points for experience : Your application will be accepted for further processing if you have at least 1 year of fulltime experience in 0213(NOC in your case) in last 10 years and you will get marks as per your experience level (as per 8 years in your case).
Regards
joy