"Private Use" square replacing symbols on staff.

I haven't been able to find anyone with similar issues on these forums during search attempts, so I'm posting to find out how I can get rid of these square boxes that are replacing all symbols within my staffs in all projects in NOTION3. Within these square are big Ws stacked on top of a Ms and it has thick boarders that have printed on them "PRIVATE USE" and "EOOO" and "FSFF." Anyone else run into this? I'm running a purchased and registered copy that is up to date.
Also, another unrelated question I have is concerning the number of measures displayed on a single line. I go to Score -> Parts Options -> and change to value of "Measures per System" to the desired 4, but empty systems are still displaying 6 and (occasionally) 4 measures per line while filled out systems are displaying 5. Does anyone know what I'm doing wrong?
Thanks for any and all help.
Also, another unrelated question I have is concerning the number of measures displayed on a single line. I go to Score -> Parts Options -> and change to value of "Measures per System" to the desired 4, but empty systems are still displaying 6 and (occasionally) 4 measures per line while filled out systems are displaying 5. Does anyone know what I'm doing wrong?
Thanks for any and all help.