Sorry to confuse everybody.
In tracker my eligibility showed in progress and background was complete.
IRCC agent said eligibility completed and security/criminality in progress with CBSA. That is why I though my application is pennding at security.
The rejection seems to be real mistake from my side, I didn't double check the employment letter and the missing salary info. Just a little bothered that officer didn't ask for additional document and just rejected after 7 months of waiting.
Hope none of you will have made a mistake like me, so don't worry.