There's a lot of questions here so let me know if I forget any
The nose blowing and deviated septum shouldn't have anything to do with each other. Did you have your turbinates removed? If so read this post about turbinate reduction surgery
and how it can make your nasal drainage worse.
If it still looks slightly crooked than it probably is. If it was bad before (it sounds like it was) then I'm not shocked that it wasn't corrected all the way. I have heard that lateral movement of a slanted septum is not easy.
About the the bump on your nose the doctor may have left some of it. Did you tell him you wanted it to look completely different or only a subtle improvement? From what I understand the bump is shaved like you said, but the surgeon also breaks the septum with a mallet to manipulate it. For the steps done between those two things, I'm not completely sure. Someone else on the forum should be able to answer this part better than me
BTW what made you choose the "00" at the end of your username, we have someone else here with that too