Yep, it's a known issue.
Combining postage on one invoice is not being made possible for the time being. No one knows if this is a temporary tech issue, or a permanent non starter, that is, under the new system a combined postage / invoice may not be possible ?
As said, no one is confirming either scenario.
It has been suggested that a buyer after buying multiple items paying postage for each, the seller then makes a partial refund for the excess.
Not ideal I know. 🤔
@melba4646
