My Controller is bad (maybe only this one).
When it is connected to mining devices and they were hashing you will be unable to change settings.
To perform save you have to power down controller, take off hashing cable, turn on and then save settings.
After that turn off controller and connect hashing cable overthise not all boards will be visible.
I do not reccomend hashing at ghash.io. They had 1 hour downtime yesterday and today 2 hours (uk1.ghash.io)
Unfortunatelly you cant set backup pool at controller so you will loose money as i did. (7.5TH x 3 hours).
Miners while not hashing are eating electricity (around 235W per tube) so you loose even more due to web interface.
I have changed pool to slush (mining.bitcoin.cz) but it was not easy.