jryden:
It's true that arpa lost to a stronger player, but this is not relevant for the Sonneborn-Berger calculation. What matters is that alanback defeated a stronger player.

arpa's and redsales's S-Bs were computed incorrectly. The correct result is:

Section 1 	BKR	1	2	3	4	5	Points	S-B (?)	Order
1 mrbugs001	2040	 	 0 	 0 	 0 	 0 	0.0	0.0	5.
2 alanback	2004	 1 	 	 1 	 0 	 1 	3.0	5.0	1.
3 arpa    	1961	 1 	 0 	 	 1 	 1 	3.0	4.0	2.
4 Ebru    	1840	 1 	 1 	 0 	 	 0 	2.0	3.0	3.
5 redsales	1732	 1 	 0 	 0 	 1 	 	2.0	2.0	4.