HI Yannis
a card with presets stored to it can be used for OS updates, provided there's enough space to copy the update files on it. The presets are stored in a specific folder that shouldn't be touched. It only need to copy the update files to the card (no folders created for this!) and everything should work fine. You can then erase the update files….
The name of a preset is created in Vsigfile and should always show up as it is. Maybe the names weren't changed in Vsig?
Yes, a Patch Librarian would be a very useful and welcome utility…… 
best
I
