Invoice Batch List behavior

Good morning!

Our accounts payable clerk has reported an odd behavior in a single company when she enters a record into a batch using the Invoice Batch List. Clicking the 'Add' button does not progress to the next blank record. Instead, the button changes to 'Save' - as if there has been an additional edit. Again, this only happens with a single company. When she adds records in the same manner for other companies, the 'Add' button works as expected and progressed to a new blank record. This is just a minor inconvenience, but I'm not really understanding why the behavior is only present on this one company. Any ideas?

Thanks!