Hi, Yes, only one-to-one if importing from Payment journal.

If you want one-to-many, you need to choose Apply Entries... on the page.

As far as I know, this is calculated when the page is opened and cannot be imported from the Configuration Package.

So I personally recommend that it is better to do it manually, otherwise it will require a lot of customization.
And maybe the link below can give you some hints.
Hope this helps as well.
Thanks.
ZHU