Please don't make separate threads for asking the same question.
Thanks.
Now as far as your question is concerned, you don't need to worry about the Levels of Distinctions. That is not the thing for you to worry about, its the headache for CIE. They may have their own criteria for granting Distinctions about which the information is not disclosed by them.
You should study extremely hard and feel confident that you can score full marks in all the subjects. Only then, I think, there might be some chances of getting distinction.