you can only use one clock that's right you nominate the clock your going to use by timing in to it , but if ets failed and your birds are rubbered you elect to use the manual clock which is fine , however you can't clock using ets and a manual clock at the same time it's either one or the other , had same problem mesen cocks on ets and hens on rubbers two different sections so simply put them all on rubbers some silly rules out there