Xperia Z3 :: Lock Screen / Throw / Screen Mirroring

when I got the first lollipop Update I had an option to disable the lock screen completely on my z3 compact, ever since this recent update to fix the bugs in lollipops it only gives me the option to set a slide lock screen or PIN or password but not completely disable it so if I try to use any third party lock screen I have to first unlock the Sony one before it will go to that one.

my other issue is with the throw, screen mirroring s only once since I've had this phone have I been able to scan and have devices come up I have a smart TV and that came up but everytime I try to do it now it just says no devices found every single time