The thing of it is neither the shin, knee or ankle touch the floor or ground. The only difference is some do it on the ball of the foot and we do it on the inner side (arch) of the foot. The leg is in the same position in both. I have seen it in my lineage with the legs way to wide and have been correcting students for the past month.
The difference is minimal and like I said before what is right to someone might not be right to the other. I have seen other lineages do it as well but they must also be wrong. Least we are not alone.