Events I cannot explain
Both of these sound like satellites reflecting the Sun, even the first one which didn't fade.  There are so many satellites now with unusual orbits that being close to midnight in time doesn't mean you won't see them anymore like it used to.  Years ago, if the local time was midnight you could almost be assured no satellites would be visible but that's not the case now.
I think your second event was also a satellite, or more specifically a pair of satellites.  Since they vanished near your zenith at that time of the night, my guess would be they entered the Earth's shadow.  Polar orbiting satellites can catch the Sun at unusual times due to the geometry as can a multitude of the new sats being launched constantly.
I forgot to add the the first one you saw, somewhat near M5, would be in the right position for that one to have been a geostationary sat (perhaps tumbling) but it also could have been another type, as well.