I am trying to map birth and death locations for several hundred people in the US and Europe (for a total of 532 points in one layer). Twice now I have discovered that somewhere during this process (of manually going to each location and placing a point and filling in the attribute table) the original attribute information has been switched. For example, attributes given to a point in England are now associated with a point in North Carolina. I don't understand why this is happening. Why would attribute information move around like that? It makes no sense. Please help. I've been working on this for months. I just might lose my mind if I have to do this all over again.