There are a couple of small issues with the templates. They mostly look like old ones were not deleted.
There a 2 marching bands, in one the piccolo is not fixed
There are 2 different version of Large Pit Percussion with a few differences in instruments
Comments
Sure about 2 different version of Large Pit Percussion with a few differences in instruments? I only see one " Large Pit Percussion", maybe you have another in your private folder?
Similar for Marching Band, I see "Marching Band" and "Small Marching Band" and the latter doesn't have a Piccolo
This is 2.1 build 30238c6 and here's my screen shot
I have double vision, but my glasses that I always wear fixes it and it's never been this bad. ;)
Please double check your personal folder for these templates, I don't have the duplicates here.
See https://musescore.org/en/handbook/create-new-score#User-template-folder
I figured out what happened. When I updated the build a few days ago I put it in the same folder and told it to replace files with the same name. The previous build had one named 06_Large_Pit_Percussion and my current one has it named 07_Large_Pit_Percussion (or something similar where just the number is different) so 06_... wasn't deleted.
This should close the issue then...