Your pictures look like a female. I had a female Cream Legbar that was .. *confused*. She made odd noises and actually, occasionally crowed. She displayed and mounted my other hens. She also did not lay any eggs and was removed from the flock. Chickens can sometimes be hermaphrodite and will act this way due to testosterone. I do not think they are capable of actual breeding. You may have one of these. But, being a rare breed, unless she is injuring the other birds, I would just let her be weird.