I have PrintMusic 2014.5 on a Mac running OS X 10.12.2. A few days ago, I scanned a 12 bar section of a chart I'm having difficulties with rhythmically, using SmartScore Lite to import it. The intent was to hear the section at speed to help me learn the rhythms.
The tiff file imported fairly well and I proceeded to clean up a few minor items. When I went to compile the chorus, the system magically added a single rest to the 5th bar and a half note rest to bar 9 (so 5 beats in bar 5 and 6 beats in bar 9). I forced all 12 bars to be in 4/4, erased the offending rests, and .... the rests keep magically reappearing.
The other strange issue is that as the notes are being output on my monitors, I notice that if the software 'crowded' the notes in a bar toward the beginning of the bar, the cursor, traveling at a constant rate across the page, interprets the extra space between the last beat and the next measure as an additional beat and adds the rest back into the music.