Originally Posted by erikepaios
The same thing happened to me. It should not affect your ability to get the achievement. All that matters is that the "completed" entry is present. To confirm this, go to the book on the coffee table in the hallway on the second floor of the Homestead. If the Farmers entry is there, you are fine.
Thanks for letting me know, that's a relief don't think I could make myself restart the game.. Nearly find it know just doctor and blacksmith left, the aren't going out if their way to make it any quicker for mr though