According to Dr. Frederick Goodwin and Dr. Kay Redfield Jamison, the co-editors of
"Manic-Depression Illness", cognitive distortion occurs during an episode, more
commonly called either depression or mania.

The following characteristics of mood disorder are identified as it may occur
in:
bipolar depression
blunted effect
creativity
emotional turmoil
expansive mood
inappropriate affect
instability
leadership in mania
unexplained affective bursts

So that's what's meant by mood disorder. Each of those has a section of the
text which is expanded and explained.

What was offered in the original thread by the Phds has been suggested as
early as the 1990's when "Manic-Depression Illness" was published and is clearly
explained in the earlier work by Dr. Goodwin and Dr. Jamison.

So cognitive symptoms occur during a mood disorder.

(I wish I had been alert enough to post this originally; I feel as though I lost a
couple of friends by suggesting as I did that the problem was a mood state rather than suggesting--as I thought--that the writer was perhaps ADD or ADHD.)