By 10 weeks, it is better to look at something besides comb development to confirm gender. These pictures are blurry and hackle and saddle areas cannot be well visualized. At this point, examining those areas for pointy feathers and sickle feathers growing out in the tail would be more definitive. Since they were previously examined at 7wks and comb development caused them to appear to be pullets, I would be more trusting of the eval at 7wks.