hmm still not get about the first test, all answer correct but still 14 of 15, from the walkthrough the only difference in question is "the more populated one", you can pick china or singapore but not shanghai, maybe is a fragment from the previous versions and explain why was fixed since is not a country, anyway you can chooce both but the result still 14/15, no that is this important as you can still get the bonus points but still...
Btw about the incest patch, i think you can still keep the dead person, it give more plot and try to explain to actions of the father, for what i think it can be like this:
"when i was child i never been in touch with my mother becouse my father and her were divorced and he kept the custody on me instead my mother took my 2 sisters, at this time was too joung to remember and underand something like this so quickly forget, after a while my father got remarried and for a short amount of time we were happy but unfortunately her new wife got sick and die from some disease. Since there my father was cold with me and we continued to relocate from town to town for his work; for a chance, after long time, he meet again my mother and even if they got divorcedthe time they spent togheter was not something that they could forget and so deceided again to move along.
Of course this is something that i wrote quickly and can be improved ( i actually enjoy it more than a simple cut) but like it is now there are couple of things that are not working fine, like the relationship between lauren that probably need to be rewrote.
Well this is only a hint and probably will be nothing serious but think about.