Repeated items in Feed PostRank

IF I call this URL:
http://api.postrank.com/v1/entry_stat...

And POST these values:

&url[]=http://feeds.feedburner.com/~r/Deysca/~3/329747930/&url[]=http://feeds.feedburner.com/~r/spaetzel/~3/326933691/&feedId=816&feedId=102049

I get back 4 items, but I only gave 2 URLs

<?xml version="1.0" encoding="UTF-8"?>
<rss>
<channel>
<title>Entry Stats</title>

<item>
<link />http://feeds.feedburner.com/~r/Deysca...
<aiderss:postrank>1.0</aiderss:postrank>
<aiderss:postrank_color>#ffe08e</aiderss:postrank_color>
</item>
<item>
<link />http://feeds.feedburner.com/~r/Deysca...
<aiderss:postrank>10.0</aiderss:postrank>
<aiderss:postrank_color>#ff7128</aiderss:postrank_color>
</item>
<item>
<link />http://feeds.feedburner.com/~r/Deysca...
<aiderss:postrank>1.0</aiderss:postrank>
<aiderss:postrank_color>#ffe08e</aiderss:postrank_color>
</item>
<item>
<link />http://feeds.feedburner.com/~r/spaetz...
<aiderss:postrank>6.7</aiderss:postrank>
<aiderss:postrank_color>#ff994d</aiderss:postrank_color>
</item>
</channel>
</rss>