Radions are acting weird

[Oilers]

I have 2 Radions hanging side by side. I've had them for a while now and they were running smoothly. However, I have noticed that they seem to run on different timeline or cycle lately even though I haven't touched or re-programmed them since the first time I got them. Right now, half of my tank has white light and the other half has blue light. Also, one would turn off about half or an hour sooner than the other. Does anybody know why and how I can fix that problem? Thanks.