You are overcomplicating things. If you want to raise to $9,500 total. Announce "Raise, $9,500 in total", take your blind back and put out $9,500. Once you announce your intentions you can put in out in what ever manner you like.
String-bets only really apply, when someone announces raise, without an amount. When you are playing live, just announce your intentions first, and you cannot really go too far wrong.
I really dont have a clue what you on about in your second point.
Oh, welcome to cardschat