One of friend posted this link, which shows not mandatory to maintain prior 6m balance for fed application...
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/express-entry/documents/proof-funds.html
But problem is coming here that as i receive ITA on next draw which will be 11th dec, i wld have 4 m maintained balance, and fed asks 6 months balance, means i have to wait to reach near 6 months balance and then proceed application...
I you should attach all post secondary documents means after matriculation/secondary education, and attach ECA report only for masters, no issue in it as point grid is only for highest degree