Quick question on DNA matches, My Maternal family has been in Canada since the early 1900's
and before that Ireland and England, And my Paternal side is Native and been in Canada along time.
Alot of my DNA matches are of Americans and a majority are from the deep south, i know for a fact none of my family ever moved down there or have any American connections, nor any of the last names or areas. How do they go about figuring this out?

Thank You