I looked at your posting and I noticed two things. First thing is the rear screw is set so your notched thin metal plate is moved probably as forward as possible which is for the largest boot size in the range. If you look at the setting on my binding, there are two notches in front of the rear binding. On yours, there are 4 notches. Each notch is about 1 cm in length, so yours is set to be about 2 cm longer. Try turning the rear screw to move the notched thin metal plate back to adjust it for the smallest size boot and see if the range of motion decreases. If you are getting a range of 65 mm and you lose about 20mm or so of movement, it will be approximately 45mm which is closer to the range I am getting of 48 mm.
The second thing I noticed is that you have a Marker Schizo Squire and not a Griffon. But I am not sure if that would affect things or not. It is a different model, but the measurements of all the metal parts and rear base plate we compared were similar, so the design of the plastic components may be similar enough to have the same problem. We will see after your test. If not, it could be because it is a different model.
Even if there is a limited range of motion, I still want people to realize that it is only for the smallest boot sizes. From my measurements, for a boot size of about 265mm, the metal piece went back too far behind the groove by about 15mm. As the boot size gets longer the problem should get better and at a boot size of 280mm, there should be longer a problem if the wire is left in the anterior most slot on the underside of the front binding.
Also, this is for a 2011/2012 model. I do not have a 2012/2013 model Griffon, so I do not know if there have been any changes in the new model.