Happy New Year!!A couple of thoughts and points for you:-
The Link with Linda may be via John (Married Ann Whittle. They seem to have had children - James Whittle (Linda's line) and William. This may be William (b 1826 married Elizabeth) which seems to be your line. Not sure that I have your up to date tree though. Can you send new Gedcom or FTM file for me to compare? Have you added Gordons line?