Recieving Null when I should not be with JSONParse.js

I'm using the JSONParse.js script from the unity wiki found here and I keep getting back Null for values that should be coming back as numbers like 4.4700000. I don't get back null for numbers like 14932.

Here is some code that I use.

 var dataWWW: WWW = new WWW (dataFile);
 yield dataWWW;
     
 var newDataParsed = JSONParse.JSONParse(textStringData);
 print(newDataParsed["data"][1][key4]);
     
 //this print statement prints null when the number is
 // something like 4.4700000 but it comes back as the a
 //number if the number stored in the JSON file is somthing like 14932

What could I be doing wrong here and what can I do to fix it?