So basically if I've to input the correct information and withdraw in EUR even if my bank was example AON
Why would you withdraw in EUR when you are not in Europe?
It gets converted to EUR by Bitstamps bank and back to your currency by your bank and both take their cut.
I said example. I'm located in Europe obviously. The currency of my country is not EUR though.
Also i'm inputing my bank account number right? I know that there is another number which you can request so that a someone can send you a payment (not sure how it is called though, sadly can't explain it better). I have both.