You may be talking about DoF (depth of field). If yo don't want it, just the regular camera app instead of the Nokia camera. Or just keep using auto mode and don't play around with manual settings.
Or maybe you just need to clean your lens. Smudges and finger marks can ruin your photos.
Here's a sample of a shot I took (using Nokia Camera app) with manually adjusted focus. Amazing DoF.
Well, I like the Nokia Camera because of the full control capability (with manual controls). Maybe because I am a photography enthusiast and I know what I am doing. My main camera is a Nokia D7000 DSLR.
Did you went straight from Black to Cyan without installing the 8.1 DP at some point? Because I have the DP installed and also have the impression that AF is not as accurate as it was with 8.0 Black. However I thought they would fix this on Cyan....guess I was wrong.