Cognizant — Regarding Candidate Information sheet and Offer letter

Hi Team,

I am Huma Khan, I completed my interview on 10th July and got a call for salary negotiation on 17th July and immediately after my HR discussion I received mail to fill CIS form which I did right away, then again on 21 July I got the exact same mail so I filled it again but this time from my recruiting HR. Can anybody help me know why did I receive CIS mail again and till when can I receive my offer letter.

Thank You.