condition type for header

Hi Experts,

My clients are maintaining three condition types for payment term. ZADV-advance, ZPRP-progressive, ZRET-retention.

my client are maintaining this condition types in line item. now they want on header level. so,i check on header condition in V/06. now the problem is when i am doing partial delivery and invoice this conditions are showing double in VA02.

Regards

Ritesh