On another front, if you do end up being sure of your findings, let it alone. Genealogy also contains folks who appear to waste a great deal of time challenging other's claims- it's just wierd. Certainly there are those ninnies out there who have Queen Nefertitti and George Washington all in the same line erroneously, just to I guess have Big Pants or something. ( As Andy said, Ancestry is riddled with this kind of thing. Maddening because you can inadvertantly stick incorrect information in your tree if you're not extremely vigilent. ) Seems silly but whatever. There are also those who seem to just LOVE nit-picking the bejeesis out of anyone who has a connection which might appear 'important'. We have one we've just always known, like we know who Mom is- just always been there. I'd rather chew off my arm than mention it because BOOM- Scoffers Unite, Inc. collectively begin the Inquisition. Little distant, just apparently no one has ever been related to anyone, ever on the planet. My point being, once you're comfortable with your proof, try not to allow SU, Inc. rattle you. It's just a nice 'thing', isn't it?
The Hartranft in my CW ancestors shares grgrgrandparents with John F. Yes, it's verified or would not bring it up.