I'm glad to hear that the demarcation is not that old, tho the map features they may have used to digitize at that time may have been.  In any case, it's a good idea before uploading imports to do a Simplify with a small  value; in this case I used 30cm which is very small, in a typical satellite image it is less than one pixel.  Cleaning nodes with a small threshhold does not move the feature in any significant way, and it has all the advantages of map data that is easier to maintain and serve.