Overview:
Discount rules are not working for newly created orders, only Limit or List Price type pricing rules have any effect.
Root Cause:
The zvod_Recipients_vod__c field is added to the Order page layout which enables the Multiple Recipients feature and prevents the discount rules from firing.
Solution:
Remove the zvod_Recipients_vod__c field from the Order page layout.
Related Documentation:
CRM Help Documentation: Fulfilling Orders with Multiple Recipients