Don't know either. I was not there, nor were my friends who could tell me.

Could have several reasons. Indeed, deviation of the course, not rounding a markpoint, etc

Also sailing with a frontsail can be the reason, because that's excluded in the Texelrating for the P15.
The same applies for a deviation from the exact measures of the mainsail. Powerhead/a bit larger etc.

Somebody who sails the round on a P15 between all the other (ultra) machines has ofcourse an attitude like: "go to hell, f... the rules".

At least I (should) have!