2.1.286 Part 1 Section 17.9.17, numFmt (Numbering Format)

a.   The standard does not specify behavior when numFmt is bullet but lvlText is also set.

If the numFmt is bullet, Word will use the literal text in lvlText, ignoring %x syntax in lvlText.

b.   The standard states that the format attribute takes precedence over the val attribute.

Word ignores the format attribute unless the value of the val attribute is equal to "custom".