Item lists always starting with first character (missing start attribute)

RapidWeaver Version: 6.3.4 (15071)
System Version: 10.10.5
Hardware: iMac (27-inch, Late 2013), 3.5 GHz Intel Core i7, 32 GB 1600 MHz DDR3.

Choosing to create a list always starts with the first character of list (e.g. 1, A, i, etc.), rather than what is chosen. It displays properly in Edit mode but not upon Preview/Export.

Expected Result:
The list item should begin with the character chosen in the dropdown dialog box.

Additional Links:

Manually copying the source code into an html page and inspecting the list its obvious the start attribute is missing. Placing start="2" after the <ol results in the proper listing. RW doesn’t appear to be creating the start attribute.