I set the flat postage rate as $5 per additional item, but it did not show on the listing postage.

[rx229]

I set the flat postage rate as $5 per additional item, but it did not show on the listing postage. 

What can I do to make it apply to the item?

thanks a lot.

[k1ooo-slr-sales]

can you let us know the item number so we can take a look for ourselves?  That will let us provide an answer for you.