In and of itself, this says nothing. Even a threefold increase in something might be "dramatic", but if it was tiny to begin with, it still won't have much of an effect on the big picture. And the fact that it took something like 9/11 - fifteen years after the original amnesty - to even do that much shows what a sham the amnesty was.
To answer your second question, I intend to be fooled only once.
So do you think that the country was fooled once by the '86 amnesty?
I do not think the country was fooled even once - especially given the 40 million unborn babies aborted, we NEED good people - that need will get even more obvious once the Baby Boomers start retiring in droves.