Occam’s razor: human error. Count those ballots!
“One-third of precincts in Wayne County could be disqualified from an unprecedented statewide recount of presidential election results because of problems with ballots.
Michigan’s largest county voted overwhelmingly for Democratic candidate Hillary Clinton, but officials couldn’t reconcile vote totals for 610 of 1,680 precincts during a countywide canvass of vote results late last month.”
Full article here.