They didn't. See:
http://www2.usfirst.org/2010comp/eve...chresults.html
Final 1 was a 18-18 tie.
Final 2 was a 15-13 win for Red.
Final 3 was a 13-8 win for Blue.
Then the tie of Final 1 was replayed, resulting in a 14-12 win for Red. This replaces the 18-18 tie in the match results list.
TBA scrapes results off FIRST's site, and has to fudge in the replayed matches. They evidently copied Match 2 as Match 4 rather than adding in the 18-18 tie.