Select the empty measures in question and pick Clear from the Edit menu. It may indeed have to do with the MIDI import, but Clear should fix it. If your staff is part of a group, make sure "When hiding empty staves" in the group attributes is set to "hide normally."
How do you hide empty staves in Finale?
Press CTRL +A to Select All. Choose Staff > Hide Empty Staves. The staves disappear from the score, and are replaced with dashed lines indicating the existence of one or more hidden staves.
How do I delete staves in Finale?
Or...
- Click the Staff tool. . ...
- Select the handles of (or measure regions in) the staff or staves to be deleted.
- To remove selected staves without adjusting the position of the remaining staves, choose Staff > Delete Staves. ...
- To restore the deleted staves, immediately choose Edit > Undo.