When I define a coupon, in the cart its value is added to the total amout instead of deducted.
For example, I set the acb10 coupon to 10% and I used it to buy an article whose price is 750,00 euro plus VAT. But as you can see in the attached image (in Italian, sorry), the value of the coupon has been added to the total amount instead of deducted.
This strange behaviour happens both with VM coupon function and AWO Coupon Free (that's the one I used for my example).
In the past, coupons worked well.
Joomla 2.5.14 and VM 2.0.22b
[attachment cleanup by admin]
Upgrading your coupon extension should fix the problem.
Thanks. You're right.