odd behaviour on display

[wooly]

look:

have you noticed that the two output give a different voltage, even if connected to the same supply, what is strange is that without load the 0,1 V difference remains.
Also, what is the sense to clobber the display giving the frequency for each output separately ? since the supply is the same, it must be the same for all, and voltage that is measured before the relay [otherwise would be 0 when the relay is open] these two information could be made on status line. (note anyway that on 4 devices attached there are no two that give the same voltage !)