Currently, parseIntegerArray function is used for both integer and float value parsing.
This isn't working for actual decimal numbers, since parseInt is used:

var parseIntegerArray = function(val) {
  if(!val) return null;
  var p = arrayParser.create(val, function(entry){
    if(entry != null)
      entry = parseInt(entry, 10);

    return entry;
  });

  return p.parse();
};

This is related to the pull request #96.

One possible fix could be checking, if the string contains "." and using parseFloat instead:

      if(entry.indexOf(".") > -1) {
        entry = parseFloat(entry);
      } else {
        entry = parseInt(entry, 10);
      }

Tho, more elegant way would be to write separate parseFloatArray function for types 1021, 1022 and 1231.