Martinitime1975

I have two orange amps: a Micro Dark, and just got a CR120 head. If I have just delay, reverb, and looper pedal in the effects loop everything sounds normal. If I move my phaser and /or chorus pedal to the loop I can head the signal modulating even when the pedals are not engaged. Am I doing something wrong? If the modulation pedals are in my normal chain (after overdrive) I don't hear anything out of the ordinary and the pedals act like I would expect when engaged. thanks