okay so first of all my phone was finger print secured and few days earlier i tried to change that to password secured. That's where the problem begins in middle of the process i typed the 1st time password and during confirm password i didn't typed any thing and taped back button.. because i thought there was some mistake in typing the password 1st time ... but here is the weird thing screen lock type has been changed to Secured with password but when i lock screen it is only swipe unlock ... and when ever i try to change it ... it is prompting me to confirm the password (password setting standard procedure's confirm password) which i don't know what i typed at the 1st place 
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