nand-sata-install and fstab

Hi, I am not sure but it maybe a bug in the script. After starting device from SD card (it is visible as /dev/mmcblk0 device) I have /etc/fstab as following:

root@orangepiplus:/etc# cat fstab
/dev/mmcblk0p1 / ext4 defaults,noatime,nodiratime,commit=600,errors=remount-ro 0 1
tmpfs /tmp tmpfs defaults,nosuid 0 0
/var/swap none swap sw 0 0

Then I run nand-sata-install script. It is working correctly, but later on it is modifying copied fstab file and content is as following
(pls pay attention on /dev/mmcblk1p1):

root@orangepiplus:/mnt/rootfs/etc# cat fstab
/dev/mmcblk1p1 / ext4 defaults,noatime,nodiratime,commit=600,errors=remount-ro 0 1
tmpfs /tmp tmpfs defaults,nosuid 0 0
/var/swap none swap sw 0 0

In my opinion it should not be done like this, because after reboot (without SD) emmc (which is currently visible as /dev/mmcblk1) will be visible as /dev/mmcblk0.

BTW. I corrected this value by myself. I remember that some time ago I had a problem as my filesystem get mounted only read-only. Not sure if this was the reason...