Happens with me aa well...(i guess its because dmm server strengths are better and more strong than nutaku)

First 6 rolls...(calliope), (zola), (the silver bowrider which rides over the sabertooth tiger), (silver mage that heals), (Khuri) and finally another silver rouge...

hence 5 silvers 1 gold...
bt to be honest i like all the female units atleast...and they altogether blend in my team perfectly