AbleCommerce Shopping Cart Software

Hello

I have a group called Member, and others are treated as regular customers.
I am supposed to have separate volume discounts for customers and members. So to accomplish this task I created a volume discount for members and added to member group, then I created a volume discount for customers and added it to all groups.

Now When I am customer I can view customer discount and volume discount is working fine for customers. But When I logged in as Member I can view both member and customer discount (in the basket screen), but I am charged with customer discount.
Is this a bug? If not how can I fix this?
When this is working fine with customers I guess it should work fine with members.

Presently my cart is in production and customers are charged with wrong price. Please provide me a solution ASAP.

are you saying your non members discount has a Global setting? I had a similar problem with shipping methods. You may need to get more "specific" no pun intended. Maybe set up a group called non-member discount so that each user falls into one or the other but not "all".

No I haveset the discount scope to specific product and for the groups 1) all groups for customers
2) specific group for members