[Koha] Overdue notices only list the first book/item that's late

Hello everyone, We've noticed that the email overdue notices that go out only seem to list the 1st item that is overdue, and not all overdue items. For example, if I checked out 2 books on the same date/time, I only get an overdue notice for one of the two items. Anyone have any ideas? I would think that both items should be in the same email or at least two different emails should be generated. Thanks, as always! Steve