1) Probably. The original Aug 1 date was the original likely new MR program start date. Since that date has been firmed up later in the month, should be ok. Keep in mind that the worry about changes is based on reading between the lines and from second hand sources.

2) Some properties may do you a "favor" by not charging a no show meeting. If they do charge you, you should be fine for (eventually) collecting the points for the event, and then the nights credit based on the points/event being posted. There's explicitly no requirement for the meeting organizer to attend the meeting (which isn't quite the same thing as no one needs to attend, but I personally have not ran into a property making that distinction).

3) And the property doesn't combine them into a single event. Since the property isn't granting the nights, they're only posting points for the spend. From their perspective, what's the difference between 900 points posted as a single event or 3 different postings of 300 points? Other than slightly more work for themselves? They should post individually if each event has a different contract number, but laziness can creep in requiring more work on your part to fix later.

One hour is just fine. I've done a meeting as short as 30 minutes.

4) Yes! ^^^