I have taken your feedback into consideration. Unfortunately as we were overseas at the time we couldn't get the aircon fixed for you right away.
The house being under a flight path is 95% of properties close to Sydney, it's just the nature of the location. The flights do have curfew times and they are pretty reasonable.
We came home and checked the outside area, and yes the leaves drop from a gun tree that is on a property, again, not much I could have done to save that. We put the outdoor furniture under the sofa to save it getting wet in the rain etc whilst no one was home.
The BBQ was definitely clean, it is a normal Australian BBQ hot plate that has been used 1000 times. So of course it isn't crystal clean, definitely in using condition.
I hope you enjoyed your stay after the little things weren't right. Sorry about those.