Hi Tim,
Using the Note Velocity tab, it shows that the notes in the locations you've mentioned all have note velocities of 96. All the other notes in the piece as far as I can see have a Note Velocity of 30, which explains the sudden change in perceived volume.
If you want to set all notes in staff (or other region, such as the entire file) to the same Note Velocity level, you can do the following:
1. Select the notes you want to edit. For large groups of notes, the easiest way is to use the Region select method.
2. After selecting the Region, click on Region/Convert region to selection of notes. This will turn all the notes blue, indicating their ready to edit
3. Now click on Note Velocity tab.
4. Click the "96" button in the palette toolbar, and enter whatever value you want for the loudness (eg. 60), and click "Ok".
All the selected notes will now have that value for the Note Velocity (loudness).
ttfn,
Sherry