I think you tend to or like to overcomplicate things. Work experience for Express Entry is calculated based on the work reference letter you provide. This was made clear in a post above but you are now bringing in all those government records stuff which is not required. You submit one document signed by your employer and that is it.Bro I am also hoping to apply for SINP, but having an issue with work experience proof requirement. So, I basically have only 10 months of government issued record- which is my social security - for 5 years of my work experience. There are many reasons behind this, one of them being that for nearly 2 years I was working with my company from abroad and did not really need a social security in my country.
My question now is that would this lead to an application refusal, or can I get away with a refusal through providing explanatory letters from my employer on why my social security record is much lower compared to my actual years of claimed work experience.
My other advice would be please do not write any letter of explanation with your application. If you write a LOE similar to your posts most definitely you will confuse the visa officer and even if it is not a rejection it may add a lot of delay to your application.
Express Entry document requirements are not as complicated as some may think. Requirements are straightforward and you need to provide what they ask for. Many people think that the people looking at their application know about rules in every country under the sun. Like which countries have government records of social security for the number of years worked etc. etc. Well the visa officers are humans and they don't know everything. The best you can do is just provide what they ask for and minimize the other noise.