I am having issues with the merge function in my editor. I have a 200 km long polygon that I have fragmented into individual polygons with unique values. When I went back to merge some polygons and change values the merged polygons shift making an incomplete polygon. The result is not sliver polygons it is gaps in the once connected polygons. This turns into an issue when I go to run an event generator on the data. Does any one know why the polygons are moving?