Line distance in Staff Properties

I am rather new to Musescore and try to find my way in all the settings.
One thing that I stumbled upon is this Line Distance settings (when I was checking how things will look like).
I changed this setting from 1.00 to 1.10, so far so good, until there are noteheads with a 3 or more of the small "extra" lines ("hulplijntjes" in Dutch) in between two systems, then the placement of the heads is gradually getting worse!
In the handbook is written: "The distance between two staff lines, measured in spaces (abbr.: sp.). Note: It is not recommended to change this value from the default shown. If you need to make the staff larger or smaller, use the Page Settings dialog instead."
I can see now why this is not recommended, but now I wonder: why is this setting there, what is the purpose of it?
Example 1 is wrong (Line distance 1.10), example 2 is right.