In a structured content XML definition file, the "initial-size" parameter on a repeater is never taken into account.
The file currently reads (line 165) :

<fd:repeater id="{@id}" initial-size="1" min-size="{@min-size}">

To correct it, "1" should be replaced by @initial-size.

<fd:repeater id="{@id}" initial-size="{@initial-size}" min-size="{@min-size}">