@Merlin836 I recommend sticking to the index as described. Don't overcomplicate or overthink.
I would always reference the dates of documents, emails etc the time and day they were created.
Preliminary documents are Case Summaries and Chronolgies. Keep Statements in the statements section. Remember, you're giving this bundle to a very busy District Judge, potentially. Make navigating it simple.
It is acceptable to hand documents in to your local family court in person. In this instance, you're unlikely to have a copy if the respondent hasn't helped by sending you one. Are you really compiling the bundle on behalf of both applicant and respondent? I was ordered to produce the court bundle as the applicant but it was'nt on behalf of the respondent.
The procedure doesn't involve you chasing the other party.