Hi Justin
1), 2) Sounds like you may have some bugginess with your playback configurations. The only way I know of to "fix" it is to go into your Sibelius users folder and delete everything that's there. Delete the last directory of this path (Mac): /Users/yourusername/Library/Application Support/Avid/Sibelius 7/Playback Configurations. Don't worry, once you start Sibelius again, it will recreate the folder. From there you'll need to rebuild your configurations.
3) You'll have to contact Sibelius about that. Though, I suppose the above could be causing it.
Let me know how you get on.
1), 2) Sounds like you may have some bugginess with your playback configurations. The only way I know of to "fix" it is to go into your Sibelius users folder and delete everything that's there. Delete the last directory of this path (Mac): /Users/yourusername/Library/Application Support/Avid/Sibelius 7/Playback Configurations. Don't worry, once you start Sibelius again, it will recreate the folder. From there you'll need to rebuild your configurations.
3) You'll have to contact Sibelius about that. Though, I suppose the above could be causing it.
Let me know how you get on.