Hello VladGom!!
You should not overtake in a Convoy. It is one of the main rules in these events. If you do it, it is normal for administrators to kick you, you do not comply with the rules.
Also very important, you must drive with a single trailer, not with a double trailer or heavy load. Next time don't go ahead, follow the rules and they won't kick you.
You will enjoy the event twice as much.
I'm glad you had a good time!!