Sales Chart (This month report issue)

I have a problem on my ERP, the issue goes like this: On my sales chart I have three things that show, 1. What i have made this month, 2. My goal for this year, and 3. the percentage of completion, but on my “This month” gains, there is a delay, the last sale that I made, won’t be reflected until I make a new one.
Is there something wrong? Or what am I doing wrong?

Here is a picture of the section I am talking about.

Thx for your help

cc @pratu16x7