You are reminded that at each race briefing that if you are dropped and end up joining another grade, you MUST NOT interfere with the race.
It has been noted in the past few Saturday races, some grades are joining with a lower grade after being dropped, and are then riding in the pack, taking turns on the front or drafting riders back to the peloton.
This is unnacceptable as it interfers with the outcome of the race. If you join another grade, you must stay at the back of the pack and do no work for the other grade.