Can you try to use absolutely correct wording or prepare a detailed table - before, after etc?
"Logic use the first journal" - incorrect - logic use the total amount after posting first journal
"when i post the second journal it use the first one and the second which is" correct! The logic will ALWAYS use the result like:
Initial Value + Journal1 Value + Journal2 Value
By design! And there is no way to change it, because logic is working with the cube data - not with journal table entries.
Vadim