When I was doing mine (OH is Aussie), I just put in as much as we could. For us it was difficult as we were renting and everything was in my name as he was working out of the country when we moved into our flat. I sent everything I could and put a summary on each piece of evidence about why it was relevant i.e. bills in my name, then copies of bank statements (joint), and OH's showing money transfer to mine.
I think you may just have a picky C.O. I'm pretty sure everyone who wrote us a statutory dec were never contacted!! They would have told me if they had been!
I probably sent too much, but more is better than less if it gets it processed!!
All the best with it and I'm sure you'll be enjoying the sun soon!!