To clarify the root note bit, the idea is that the root note is kind of like middle C. So by setting say, the root at F1, you have better access to higher notes, whereas as root at F7 you'll be able to go further down. This becomes quite important once the interval number gets higher and higher. In practical terms the highest available interval number of 99 makes sense with only 127 MIDI notes available.
Copying settings from one scale memory to another should also be possible. Importing Scala settings into a memory I'd anticipate as a seperate load icon in the Pitch/Scale Edit section.