DictionaryNameFinder Not Finding Longest Match When Name Ends in a Number

[Richard Head Jr.]

Here's my dictionary:

<?xml version="1.0" encoding="UTF-8"?>
<dictionary case_sensitive="false">
  <entry>
    <token>vitamin</token>
    <token>b12</token>
  </entry>
  <entry>
    <token>vitamin</token>
    <token>b</token>
  </entry>
  <entry>
    <token>john</token>
    <token>doe</token>
  </entry>
  <entry>
    <token>john</token>
    <token>d</token>
  </entry>
</dictionary>

When ran on this sentence using a DictionaryNameFinder: My name is john doe, 
aka john d. I like vitamin b12.

The following tokens are found: john doe, john d, vitamin b

As you can see, when the 2nd token ends in a number, the longest match is 
discarded. 
Bug, or am I missing something?

Thanks