Are you certain the Lat/Long figures were correct? In the early days of GPS, the government would intentionally introduce errors into the GPS satellite clocks periodically for national security reasons. When WAAS was introduced, no intentional errors were introduced because the airline industry was dependent upon its accuracy.
2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2014 Sunset Trail SF270BH
Holly & Buster, mini Dachshunds
2016: 1 trip, 3 nights in 1 state, 316 miles
2015: 5 trips, 18 nights in 3 states, 2707 miles
2014: 5 trips, 14 nights in 3 states, 2426 miles