Device colour changes when mem fader goes up

Hello !

I’m using a Smartfade ML and get an issue I can’t fix : 

As an example, I set led pars on blue using the param 1 button, selecting my devices and setting RGBW values. I create a mem pressing « mem » button and then hitting the 1 button. I set a second mem with red on mem 2. BUT as the last device colour state is red, if I increase the mem 1 fader,  the devices colour goes from red to blue as the intensity increases. I CAN’T have a blue at 20% intensity (for example). And it drives me insaaaaaaane!!!!

Does anyone can help, please?

Thanks a lot!