Error with custom wallpapers.

I just removed ads on my Kindle by paying the $20 to amazon. I also added some custom wallpapers. I don't know at what point it started but now every time I open my case, the screen automatically unlocks. I'd prefer that it wait for me to swipe the screen to unlock. I have some nice wallpapers including a nice portrait of Emma Stone that I would love to actually be able to admire. Does anyone know how to fix this?
http://www.mobileread.com/forums/sho...d.php?t=195474
This is also the link that I used to add the custom wallpapers.
Edit:I know I could just set a password on it but it covers the wallpaper and is time consuming.