I bought a Nikon refurb D7200 a while back and over the weekend it did something strange. I had set the U1 and U2 up for Landscape/Portrait and Action/Sports respectively. Both were set up a aperture priority with different settings for auto focus, auto ISO, and several other parameters. Over the weekend while photographing my son's college graduation I noticed it wasn't responding to changing aperture settings. On closer examination, U1 and U2 were now in "P" mode, not "A." I've not been able to replicate this. Any body have any experience with something weird like this. The camera is about 30 days into the 90 day warranty and I want to sort this before that runs out.