Strange thing Jack. I just checked my Lan DHCP page and ALL my manual assignments were gone. Table was empty.
I also noticed that your header was missing from the top of the LAN DHCP page, the one that gives the version number of YazDHCP. I might add that all my other scripts were present and correct as was the Addon tab.
I tried a router reboot, no change. Browser refresh, no change. I even went to the command line and reinstalled your script again but YazDHCP and all my manual assignments were gone.
Fortunately I made a settings and JFFS backup just after installing the script.
After I restored those, you tab and the assignments appeared. They survive a reboot.
I don't know when I lost it, but did notice a couple of days ago that my Network List looked different.
Any ideas what happened?