Drobo 5D with new firmware 4.1.3 still won't go past 16TB

I recently (today) reset my Drobo (via the dashboard) and installed new drives taking my capacity up to 22TB. I went to format the volume and it says I need two volumes since capacity is > 16 TB. I thought the point of the firmware upgrade was to allow me to go up to 64TB.

What am I doing wrong?

If you have followed this advisory about resetting the drive capacity:

and if you still have this problem, here is a suggestion only:
Format your drives sequentially. Start with 2 drives and confirm visibility/operability, then progressively add another, each time checking for operability.

Let us know if this provides the work-around you need?