Well, could be, but those voter numbers are sequential and start with #1 in line. DePere is GOP country to boot, so union fraud would be tough to pull off there.
I'm no expert on WI politics but lots of reading and interpolation of data have me feeling confident that Walker wins, and wins easily - I think a 53/46 margin is not unlikely.
But, of course, I hope you are right and Walker takes this in a landslide.