The second bug is definitely lightroom. The export to jpeg is producing awful results. I
More likely to be operator error than a Lightroom 5.2 bug, Sharon.
With two calibrated Dell 27" Ultrasharp monitors, if I export a web-sized (let's say 800x600px) Jpeg from Lightroom and open it in Windows Photo Viewer on one monitor with the pre-export image showing in Lightroom Library module on the other monitor, they look identical to the naked eye.