@Aaron342
Can you search your inbox on the app? There should be a little magnifying glass at the top. Have you used the filter in the inbox, accessed by a little slider icon next to the magnifying glass? You can filter using "pre-trip" so all other messages won't show.
Moving to the calendar, I can see three calendars at the top and the reservations and check-ins listed in date order just below that. Choosing "view all" gives you options: pending, upcoming, ongoing, pending review, all. "Upcoming" lists them in date order.
I and haven't seen the drastic changes reported here. But I use Professional Hosting Tools. Have you requested those? They say you need to have something like 6 listings to use them, but that's not the case. You can just ask for them.