The plugin should detect the asterisk reload event and update fop2 internal tables. You should have to verify tables by hand after adding something into asterisk and reloading asterisk, (and before doing a fop2 reload), try running:
Do you see the changes (new aditions, label changes, etc), in the output ? If not, then the config on reload plugin is not being executed for some reason (perhaps a wrong path is set for the update_db.php script in the plugin config, or permissions are not correct...? perhaps asterisk is not publishing a reload event in AMI).