I have a feature class with subtypes and other domain driven attribute fields published to a feature service. The feature class has a feature template with the features symbolized via the subtype values in alphabetical order and the same for the coded domains. everything displays and works properly in ArcMap (10.2.2) and the MXD utilized to publish the service. Once accessed in AGOL in the map or a custom web app, the legend symbols and the domains remain properly alphabetically sorted but the subtype drop-down list when editing is in a random sort order. The order never changes it is just not in the proper alphabetical order.