The fields of a template will be placed by default in alphabetical order (according to the internal name you have chosen):
The layers will appear according to the Indesign file (knowing that layer N.1 normally corresponds to layer N.0 in eDocBuilder). The layers can be managed in the "Stacking order" option:
This indicates the overlay of the text or image in relation to an image or other object. Options:
-1 = under the master PDF
1-100 = normal fields
101-110 = overlaid fields
(In Interactive templates, these fields cannot be modified by the user and always appear above the user added fields).