It's focusing on one phrase out of Kate's book "non-functioning" and blowing it up into evidence of suspicious behaviour that is so unattractive and unpleasant, and well, downright pathetic, IMO. "Non-functioning" means what, exactly? Unable to walk, talk, breathe? Unable to perform simple tasks? Or does it simply describe a state of mind, a numb devastation, the inability to control ones thoughts, to feel helpless and panicky? Why is this phrase so significant to you, apart from as a useful tool with which to cast doubt on other actions that Kate said she performed that night? All completely irrelevant of course as she is not a suspect, a German paedophile and rapist is, hard though it is for you to get your head around.
According to Kate McCann non-functioning seemed to mean a lack of strength of some kind;
Mrs McCann said: "The first 48 hours were incredibly difficult and we were almost non-functioning I'd say, but after that we got strength from somewhere."
http://news.bbc.co.uk/1/hi/uk/6692161.stmFor her husband it was;
the "information void" in the first 48 hours of the investigation was the "hardest thing for Kate and I to deal with".
http://news.bbc.co.uk/1/hi/uk/6692161.stmBy 10pm on Saturday 5th then, they were recovering whatever 'strength' they had lacked earlier because;
The McCanns said "communication channels" had opened since then: "Certainly at the minute we are happy about how information is conveyed to us."
And they said it had helped "tremendously" when they began to take some control of publicity around the case.
http://news.bbc.co.uk/1/hi/uk/6692161.stmSo lack of control and information seems to have been what drained their strength in the first 48 hours.