Default [Q] Is my approach to a full backup correct?

I have a Samsung Galaxy Ace II (GT-I8160) running on CyanogenMod 10.2 by TeamCanjica with CWM-based Recovery 6.0.2.8 by Shaaan and rooted like this when I came from Android 4.1.2.
Via NovaThor Settings the quite small internal storage is switched with a 16 GB sdcard.

Now I am a bit worried, that a nandroid backup via above mentioned CWM-based Recovery -> backup and restore -> backup to /storage/sdcard1 might not fully work:
  1. Can the backup deal with using the sdcard as storage for the backup while the sdcard itself is used as internal storage?
  2. Is sdcard1 the correct storage anyway or is it sdcard0? How to find out?

In the end I want to give CM 11 another try, but still like CM 10.2 and want to be able to get back there the way I set it up.