Is there a way of preserving the mac filter list when I want to temporarily disable it? I just disabled it and when I wanted to re-enable it my list was gone I guess I'll have to type it all in again?
Do not disable the MAC filter using LuCI. SSH into the router and manually edit the file /etc/config/wireless, commenting the line
# option macfilter 'allow'
Do not touch the listed MAC addresses.
Restart the wireless.
In the meantime, if you make other wireless setting changes using LuCI, you will lose the listed MACs again.