When do the "extra" team members become relegated to the support team?
It reads like they should take part as support team members beginning the round when they do not take part in the main team. So, in our case, we cannot field 6 decks in Round 3, so we get an extra support team member in Support Round 3.
Based on the Support Team battle list, it seems like they became available in Support Round 2. While this is much more useful, it seems impractical due to the way the deadlines work. If you have a battle near the end of the duel phase that could impact your support team size and your lieutenant is not around to watch it, he has to make his support team action post with incomplete information. And since no one else can edit it....
Either way, I just want to make sure I understand how to handle it going forward.