However, since yesterday the preview of this works fine, but as soon as I click OK the image reverts back to what it was prior to the adjustment.
Does this also happen (or not happen) at View > 100%?
Could you please post screenshots at 100% that show the Adjustment before and after committing?
I am really happy (and confused) to say that somehow it seems to have sorted itself out. I ran the updater again and was found a 1mb update for PS. Since then it seems to be fine, yet PS still says 13.0.6
Does this make sense to you? Thank you so much for your time, I really appreciate it.