I see. The risk % you see in the left column (captioned Input) is the risk % that you enter - the one you want. The risk % in the right column (captioned Result) and in the SL line's additional label is the resulting risk - the percentage you'll lose if you open the calculated trade.
There is a difference between the Input risk and Result risk because the EA would calculate a higher position size given your risk and SL, but it would be above the maximum position size, which is 100 in your case. Since, it cannot increase the position size, when you move the SL closer to your entry, the Result risk goes down.
Most likely, the position size isn't calculating correctly here (not sure how much is 100 lots of NAS100 is at your broker). This is probably caused by incorrect info returned to the EA by the trading server due to its misconfiguration.