HFM order of calculations

Hello everyone,

First of all I'm sorry for the amount of dumbness and dummyness this topic is likely to contain. I had the misfortune to be commanded to solve an issue in an HFM application whence I have no absolute idea of how HFM works —at all.

The problem within this application is that the Balance of translated currencies does not equal zero. (e.g balance in the local currency is zero, but in USD or EUR shows a diference).

We have detected that the problem comes from the way the "Differences due to Conversion" account is being calculated (it's account 30109001 in the image below).