Under Document Options/Multimeasure rests, is "update automatically" checked? If not, check it, then re-generate parts. That should fix things.
Have you tried using a staff style to show and hide systems of music?
Can you provide a link to a drummer playing the notation you're describing. Perhaps if we can hear the sound we can help more.
A closed hi hat hit has no sustain. You can notate it slurring into beat 3, but beat 3 needs an attack to be heard. The opposite is quite common though, hitting an open hi hat and slurring into a c...
I would make a copy of the file, then try running redefine pages. Another option, with the page layout tool, copy the layout parameters used on page 5, to page 6.
I'm guessing that there is no problem. The smart shapes are probably set to display in red in these files. Go to preferences/display colors and see what it's set to. Either way, it should print in ...
I no longer use Garritan, here's other options. Use NotePerformer when using Finale for playback. https://www.noteperformer.com/ When using a DAW, I use the harp from Spitfire Audio. https://www...
Have you tried lowering the velocity?
It's just a choice. It doen't matter what anyone else thinks, which do you prefer? I'm satisfied with Maestro. It's the default and does what it needs to do.
Finale can do all of this, but can you? You need to enter the correct time signature in each measure and then hide the time signature. For example, 8 whole notes in a measure needs a meter of 32/4.