Resource dailycost in assignment

Hi,

I've changed the daily cost of a resource in resource screen.
But, in the assignement screen of activity (in detail activity part of screen, I click on the pen to modify an assignement), the daily cost value is still the old one.
I've seen in assignment table in database that there are 2 fields: "dailyCost" and "newDailyCost". It seems that it's the "dailyCost" value which is displayed in the screen but not the "newDailyCost". But the calculation of activities cost are done with the right value ("newDailyCost").

it's a little disturbing that the cost listed does not match the cost used in calculating...