Hello Nakashima
You should open different threads for different questions.
Also, I'm quite sure that the modification note 100114 will resolve point 2. I have seen many customers that already implemented this note and resolved this issue. You should at least try it.
At last, it is a nice to reward another users with points for the answers. Otherwise, people won't mind to answer your threads.
You should take a look on the rules of engagement:
http://scn.sap.com/docs/DOC-19331.
BR
Caetano