Currently referral credit claimed on an order is conflicting with non-stacking coupons (coupons that are checked as not being able to be used with others). When adding this type of coupon when ordering where referral credit is being claimed, there is an error and the coupon applies, but it cancels out the referral credit. Long story short referral credit being claimed should not be treated as a coupon. This might require a checkbox in the admin to allow claiming referral credit on orders with coupons Yes/No