transaction discount problem in receipt

Hi,

I have problem with discount on buy2get1 free and discount all items. For example: my item price7$ and the quantity we need is 10 my promotion is buy2get1 free so the 2 transaction lines will be generated as line1: (107$*7)t9$ line2: (0$*3)=0$ so we save 321$ after that we discount more as 3% for all items, the system show as line1:(103.79$*7)r6.53$ line2:(0.0033$*3)=.01$ this time we save 22.47$ so in total we should save (321+22.47)43.47$ However when we print Receipt, the discount shows only 22.47 because the value in POS Template variable called 'Transaction.Discount' variable is only 22.47. Is it a bug? Is there any way that we can show discount as