Initially, I looked at the pics of the TTT. I saw that the first pic the last rider did not have an aero helmet. Then in the last pic, all the racers had aero helmets. WTF, was there a helmet change? After reading the post, it was another rider who jumped on the back of your team.
First, that seems odd at best and disruptive and illegal at worst. A drafting rider slightly decreases the aero drag of the rider in front.
This is a question for our newly minted USAC ref... ShovelHD. Is it legal for dropped riders to join on the back of a different team in a championship TTT?