Here is the auction/bid results listing and the AS report in an expanded format. It looks to me that if your 15 pound bid was placed as it should have been, one of two things would have happened:
1: you would have won it for 15 pounds or less; or;
2: "sisinello" would have had to pay more than 15 pounds; we have no way of knowing what their maximum bid was.
It definitely looks like a problem; hopefully one of the sages will have a better idea of what happened here. BTW, welcome to our humble forums.
item max # bids lead ended folder status
2253287861 GBP15.00 4 15 6/30/2004 7:21:42 AM My Snipes Did Not Win
Jun-30-04 06:33:52 PDT GBP 7.00 sisinello( 11)
Jun-27-04 09:03:15 PDT GBP 7.00 sisinello( 11)
Jun-27-04 02:48:20 PDT GBP 6.50 saxfree( 6 )
Jun-26-04 11:57:39 PDT GBP 6.00 jhruth( 6 )