I can answer:
CPL/ or IFR training done outside of a JAA member state is not recognized by some JAA member states.
for exemple if you do ur cpl in the USA and come back in UK. it will be recognized by the CAA but not by france, spain, italy.
I did all my flight test in UK after my FAA cpl/atp, to avoid problems if in case I am hired by an italian company.
for the written exams, could be the same problem. recognized certainly by the CAA if done in a JAA school in Florida, but not by the DGAC.