FDUB, it's hard to say without knowing exactly how the situation developed.

What I believe happened, is a situation very similar to the first picture in your link, except with the three boat on port and you on starboard with a starboard rounding. With the angles spinnaker cats sail on downwind legs, there is a good chance that the line drawn abeam of the aftermost point of your hull would include the pack of three boats when you reached the zone, just as in the picture. If that was the case, you would owe those boats room.

Again, without seeing the situation it's hard to say, and I'm not trying to accuse anyone, just trying to answer the questions!