Problem with new year added to Byzantium Empire Follis - Justinian I (Nikomedia mint)

I recently requested that regnal year 15 be added year for this coin. When you look at the "Add or Modify data" page, the years show up as "12", "13", etc. On the listing page, these dates show as "12 (538)", "13 (539)", etc.

When I added the year "15", after it was accepted, it shows up as just "15", and not "15 (541)". Also, the date range for this coin now shows up as "15-553" instead of "538-593".

Question: What text do I have to enter in the date box to get this date to show up as "15 (541)" ?

I guess you're talking about this one?

I suggest you send a PM to Quiquengrogne who is referee for Byzantium Empire and he'll be able to add this easily.