Letters, numbers, and dashes in ILL program

Alphanumeric strings have been turning up recently in the NHAIS ILL System where there used to be either blank spots or catalog control numbers for records from some but not all Z-targets. This is seen in lender lists...

In request histories...

And in search results...

So far this behavior doesn't appear to affect the functionality of the ILL program. Auto-Graphics is treating it as a bug.