magento - Fixed Amount Discount Code not working when two different items added to cart -

magento - Fixed Amount Discount Code not working when two different items added to cart -

i using magento , trying apply coupon code discounts fixed amount of £5 off order on value of £149. code working fine until 2 different items added cart. if value on £149, there 2 or more different items code discounting seemingly random amounts such £2.33 or £1.21. amount seems vary number of items in cart sec item added.

the code configured 'fixed amount discount whole cart' , did work previously, i'm not sure why glitch occurring now. able advise please? in advance.

select rule , update shopping cart rule setting follow:

actions => 'stop farther rules processing' = 'no'.

this might help prepare issue

magento shopping-cart