Kevin, I just went through the same steps are you described:
- With a tracks feature service that I own, in the My Contents view, I clicked the dropdown arrow next to it and chose "Add layer to new map"
- In the map, I configured the pop-up and made sure the 4 editor tracking fields were checked on for Display
- I selected the Creation Date field
- When I click on the dropdown next to the Date, it displays the list of available Date options. You shouldn't be able to type in the Format droplist; but you should be able to click the dropdown arrow.
If you can confirm the dropdown arrow cannot be clicked; then we'll need to take this offline to figure out how to proceed.
thanks, Craig