Hi, NSOI are more concerned about our Form 100, Appendix-3 and for registration - Experience, Education and Language.
Remaining things (CIC Forms, Funds, etc.,) they want to cross check.
Because after you get nominated, CIC should not refuse us for some reasons, thats the reason they want to cofirm with all this documents.
Fund (it is basic need than all), its better to have consistent last 3month statement is recommendable, apart from this you can show other savings. For CIC you need to show 6month statement. Overall, case officer should get convinced you have enough money to settle initially.