not sure what happened in your other fight that was graded, but this one was called a no contest b/c it was very early in the fight. Once a fight gets to a certain distance (not sure how far) they go to the cards to determine in a winner in this situation. That may have happened in your other fight.
here is what 5 dimes says, which seems to indicate no contest is like the fight never occurred
Results will be graded/regraded based on the official result at ringside. A result may be revised or altered after initial presentation by the ring announcer. Results are not official for wagering purposes until verified by officials at the fighting venue. Offical or unofficial sanctioning body overturns of a fight decision based on appeal, suspension, lawsuit, drug testing result, or any other fighter sanction will not be recognized for wagering purposes.