No problem, glad to help, as for question 2. Yes. the emuNAND is perfectly fine to update, BUT only the emuNAND.
EmuNAND is identifiable using the system settings, but there are tricks to identify it immediately.
1. Parental Settings on sysNAND only. If it asks for a password, don't update.
2. Change rows on sysNAND to either minimum or maximum. The row settings will remain independent of each other
3. Install a .cia theme to emuNAND and equip it. sysNAND will be plain and boring. emuNAND will remain fancy and themed.
No idea on the 3rd question sadly, hopefully someone has an answer.