Ordered delivery and debatching

The file adapter does not ensure ordered delivery, files will be picked upp in any order and submitted in any order.

But what about debatching a single file? I have had the impression that the rows in the file would be submitted in order but I’m no longer sure.
They appear to arrive scrambled, not always but it does happen.

Any experience with this problem? I don’t want to apply a resequencer and write them back to the database Before consuming them.