Yeelight V.1 problems

Yesterday I bought my second yeelight, but today I noticed that if I set the brightness at 1% and try to set the white colour it turns blue; it happens with purple too with brightness at 1%. I noticed when I set my two lamps to a warm colour they look different. When I use colourflow mode the new lamp start changing colour but it turns on and off when at low brightness… Is that normal or I should change the lamp or modify something in the app?