Navision LS Retail 2016

Hi all, I am facing a problem in Total Discount of LS Retail.

I have created a Total Discount offer as below :
in Line FastTab :
Type No Exclude

All
Item A True
Item B True
Item C True

Benifits FastTab

Step Amt Type No Value Type
100 Item D Amount

Now I scanned on POS as

Item Price
X 75
B 30

now when I pressed Total, Optional Benifits popup come(with item D)
my understanding is if i exclude item B in Line Fast tab then Benifit Popup should not come.

Then I deleted Type All from Line Fast Tab, now Benifits popup is not coming. but if I select item D with X and B it is not coming with price zero(because in Benifit fasttab i have put this item with value blank.)

where i am doing mistake??

As LS Retail does only offers access to their product to a limited number of Dynamics Partners, then you have to ask your question at the LS Retal Support Line/Mail.