The import data for county boundaries is highly inaccurate. Most of the lines are where they're not. I realized this after I found a goof that I made correcting one boundary, forcing me to correct all around Saratoga County. The lines divinging Albany and Saratoga from Rensselaer say Franklin County. I also removed a multi for the supposed Town of East Glenville. There is no such town, only a hamlet withing the greater Town of Glenville, which is bounded by Amsterdam to the West, Charlton and Ballston to the North, Clifton Park to the East, and Niskayuna/Schenectady/Scotia/Rotterdam to the south.

It's fun finding these errors and correcting them :)