Zeebs looks more barred rock to me for two reasons; domis have a rose comb and your appears to be a single comb and two barred rocks have a color pattern that appears as bars or lines where as a domi has a definate broken pattern and the lines or bars are not as noticeable. in barred rock USUALLY the males are a lighter color but not always. The males do how ever have different tail feathers. A male's tail feathers start to droop or curl downwards. If zeebs is a cockerel i would think that the comb would be quiet a bit taller by now. So it is my personal oppinion that you have yourself a very beautiful barred rock pullet. As far as the mounting goes it very well could be an attempt at eastablishing a pecking order. My oldest barred rock does this but she usually dismounts with a beak full of feathers and she lays for me every day.
my guess on the 3rd picture is a pullet that has some black and copper french maran in her blood
my guess on the 3rd picture is a pullet that has some black and copper french maran in her blood