Chime Pro Light Ring

Hi, I have just set up my Chime Pro, but it's behaving a little oddly (to me at least). It spends some of the time with a solid blue light (ring) showing, but it then goes into the following cycle: Solid blue --\> solid (faint) green --\> solid green --\> solid green + night light on --\> flashing blue + night light on --\> solid blue + night light on This cycle seems to repeat a couple of times before things return to solid blue. And then after a few minutes, the cycle kicks off again. Does anyone know what is going on? It seems that when the light is NOT solid blue, the Chime does ring if the doorbell button is pushed. So the thing becomes pretty useless for telling you someone's at the door! Thanks, Matty