heh. i reckon those tests should only be used as a pointer, so that when u take it, if u get high in certain areas, u know that they are of more significance to u. and should u go to a pdoc, u could use that, to point out what worries you.
i dont think there are any amount of times you have to redo it, i just use it for fun. and to monitor myself.
take care all
self