when i retopologize the hands [ i used copy of this mesh and then imported the topology ] and the feet only a one feet is correct others are wrong
ok, now I undertsand your problem. it´s not the retopo. it´s the projection after done the retopo.
this is often a problem I´ve too.
if you don´t get it right, you have to take the new topo without projection. 
thanx:):)