I'll skip down to the money quote, or quotes:
Ryan said an important factor in the decision to concede was the unexpected -- and erroneous -- close vote in Oswego County, where polls had Hoffman with a double digit percentage point lead heading into Election Day.
"That’s the thing that threw us off," Ryan said.
Oswego County elections officials blame the mistakes on "chaos" in their call-in center that included a phone system foul-up and inspectors who read numbers incorrectly when phoning in results. Of 245 races in the county -- not including the congressional and court races -- 84 had incorrect totals reported election night.
In the congressional race, more votes were cast in Oswego County than any other in the 11-county district.
The district’s second biggest voter turnout was in Jefferson County, where Hoffman also has benefited from a turnaround since election night, gaining about 700 votes. Owens led Hoffman by 300 votes on the final election night tally. But after recanvassing, Hoffman now leads by 424 votes, 10,884 to 10,460.
Jerry Eaton, the Republican elections commissioner for Jefferson County, said inspectors found a problem in four districts where Hoffman’s vote total was mistakenly entered as zero.