Upon import, I don't apply any presets, but once imported and viewed, a high contrast effect is applied which looks terrible. I have recalibrated my monitor and discovered the only way I can return the image too "normal" is by going into the Develop Module and under Camera Calibration, selecting Process 2003 (from 2012 Current which is the default) and then back to 2012 Current again... I shoot with a Canon 6D. Any help is much appreciated as I'm totally puzzled!!
Someplace, somewhere you are including a develop preset when you import your images. LR does not arbitrarily add contrast to imported images.
You might of accidentally changed the Default settings that get applied to all images and when you reverse the Processing, going back to 2003 then ahead to 2012 it is wiping those defaults out.
No idea how I have done this but I will have another thorough look. Thank you!