This is a great post to give to assistants to show them how to group multiple VandA sources properly.
I can’t a solution to the question, sadly, but supergrouper might help streamline your workflow (I think there’s an alternative to it too but I can’t find it at the mo).
You should absolutely post this in the Avid.com forums and direct it to Marianna as it’s a concise description of sync/grouping work that loads of assistants/editors are dealing with.
You are also more likely to get an informed answer there than here.
The newer NLEs have better approaches (multigroup as editable timeline / use of more than mono audio tracks) but editing with properly set up avid groups still better for me.