Elections are decided by the people, not by concession speeches by politicians.
Hoffman made a mistake conceding. Now Owens has the perception of victory, the quickie swearing in, and a deciding vote in the House healthcare vote. Even if Hoffman wound up with the most votes, consider this:
In the Indiana Bloody 8th (1984), Rep. Frank McCloskey lost by 418 votes on election day. the Dem controlled House overturned that result and declared (selected) him winner by four votes.
No matter what is said, and no matter what the final vote total, the Pelosi House will not give up Owens.