Field order not maintained when adding fields via form update

Step 1: Create form in Formz Builder Component.
Step 2: Add fields.
Step 3: Save form and close.
Step 4: Reopen form to edit.
Step 5: (Here's where the bug occurs) Add new fields.

On completion of the creation of a new field, the field is added into position 2 rather than at the end of the current list of fields. This happens regardless of any custom sorting of rows.

MODx 2.3.2pl
Formz 1.1.1pl
