If you know what you are seeing has something 'not right' with it, I would say go with your gut feeling. HOWEVER, all these birds need time to really get to a point where they are passed their awkward stage. Just before the full feathered stage is one where the cockerels' heads and necks don't appear to transition to their body well. That is what you are seeing with your cockerel in the photo. He hasn't filled in with his hackles yet and so it all lays funny and awkward. For most males, I would say they are to a finish point at around 8-9 months. This is the reason why I continually tell 4-H kids to get their birds as close to January 1 as they can for the August shows. (in MN the kids have to have their birds hatched after Jan. 1 of the show year). Get them younger and the tails aren't really developed and neither is the hackle, in other words, those finishing male feathers.
Now the eye, they will be more yellow colored as juveniles. By point of lay, the pullets should have their eyes looking reddish bay though, males too about that age, so somewhere around 6-7 months you can really tell what that is going to be.
The white on the pullet, is that just on some tips or is it in the tail or wings? one or two in the back?
Amen. I have some 4.5 month birds that look like Ichabod Crane, especially the Chanteclers but the Buckeyes too...just no so blatantly. When they run, their legs seem to be working on different time zones. I was prepared to 'off' my two biggest Chanteclers 'til an experienced person told me to hold me to hold off 'til they were 8 or 9 months...very slow to mature. The Buckeyes aren't much better.
This is my first year with Chanteclers and I have never seen such TALL birds at this early age. My Buckeyes are perhaps just a bit heavier than them but they grow at different levels.