Hi,
I had a look in the manual for the 1810 v2 switches
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c03500855/c03500855.pdf
Page 1-4
Click "Apply" to send the updated configuration to the switch. Configuration changes take
effect immediately.
Configuration changes take effect immediately and are saved to the system configuration file after a 1-
minute delay. See
“Saving Changes” on page 1-5 below
But according to page 9-3
"Use this feature to perform a software reboot of the switch. If you applied configuration changes, wait
at least one minute before rebooting to ensure that the changes are saved to the system configuration
file, or use the Maintenance > Save Configuration page to save them immediately"
So according to the manual this page should be still available. Or this is just a mistake in the manual (copied from the v1 manual).
One possible explenation for your issue could be that you dont wait at least one minute after "Apply" before you power down the switch.
If you wait long enough and the config is still not saved properly there is probably a bug and you have to contact the support.