The Down's of Google

I Google my GG Grandfather's name often and it was a name repeated often in the history of the family.I even found my cousins efforts to obtain help from the VA, which bought up some memories of some happy times and some very, very sad events in his life, but that's not for this blog.
I had early in my start in genealogy found on a message board a family tree with a list of names that went back to the 1650's. Being the sceptic that I am about things I see in print, I had a problem with the link between him and his father. I could follow the family down through to the 1840 census in Poland Me. His age in the 1850 census matched the 1802 birth date given in list and I had found a matching birth in the records at the Mass Vital records site. I went to the Poland town hall with no luck and also the local library there which has a nice history room. I was looking for some documentation of he getting from Lynn/Malden Ma. area to Maine. [I had also found another earlier possible error in the list.]
The original emigrant Stephen Larrabee is believed to be the start of the Larrabee family in Massachusetts and Maine, and the names of his sons were repeated in the various branches. And there in lies the problem of taking things at face value. So what threw the monkey wrench into the middle of my Gencom?
I got a hit on Google Books for a history of Middlesex County, in which it stated that my "John of the list" was born in 1802, died in Malden Ma. in 1848 two years before the "John" listed in the 1850 Me census. It looks like two John's were born around 1802 and a lot of people are following the wrong line. I have found a reference to my "John" being married in Durham Me which is next to Poland Me. and this makes me think he was born in Me not Ma..
So it looks like I'll need to review the Larrabee families in Durham for more clues. I'll need to visit the town hall this summer for sure.

Update: Upon re-reading file on Durham  Marriage, John was from Freedom Me. which is next to family farm in Thorndike and Many were buried in a Freedom cemetery.