I had no referrer to clixsense, then why am i shown a sponsor to it

Every member is a member, an affiliate, a sponsor.

If and when you refer someone you have in fact, sponsored someone.

Refer and Sponsor is virtually the same thing. I said 'virtually' the same thing.

Additionally, whoever referred you, sponsored you. Even if you did not go through
a referral link, you would have been basically referred by admin.