Q: Can I do a nand restore after I partition?
A: No. Your SD card's file system has changed and you may experience unfavorable results.
i believe your wrong sir... the backups will still place everything they need to go just they won't place anything in the sd-ext since there is nothing to put there. then if you want to make use of it flash darktremors a2sd and download the a2sd gui app and enable placing of apps on the sd-ext