ArcGIS Online sort attachment in ascending order

Question

I've set up a parcel layer to have plat book pages as attachments.  In ArcMap, the attachments are in ascending order by the name.  However, when I create a REST service and open the layer in ArcGIS Online, the attachments are in random order.  The naming convention is critical for anyone looking at the attachments, because they are ordered by the oldest plat to newest plat.

Is there a way to have the attachments ordered in order as they are in ArcMAP?

ArcMap order:

ArcGIS Online order:

Mike Minami · Accepted Answer

As far as I know, there is no way to sort the attachments in the map viewer popup. I'm sure they're getting displayed in the order they get returned from the server. This is something we can look at for a future update.

Mike