In "The Nicholas Cases", Woffinden does refer to "half-hitch" knots. Who is to say it wasn't the newspaper reporter who made the mistake?
It is true that Woffinden did change his mind about Bamber, but we don't know for certain that he was wrong!!
Maybe, but why didn't Woffinden correct it... his name headed the article in 2010 and he only died in 2018. And he definitely did get it right about JB second time around!
What I find impossible to believe is that Gordon Park wasn't responsible for the murder of his wife, despite this latest smoke and mirrors DNA rope trick. Who is to say that it didn't originate from contact with anyone, eg. the chandler/hardware store who sold it, the divers who recovered the trussed-up body, or the police and other investigators who later handled it? Park might even have worn gloves when securing the package.
Or in fact why anyone (a lover, say) other than a husband who was at war with Carol for the control of their children, dominated her life to such an excessive degree, and was rumoured to be violent towards her, should go to such extreme lengths to make sure her body would never be recovered. He was also proficient with knots, knew how to sail, was familiar with every part of Coniston water and imo deliberately evasive during police interviews.