jQuery: Cloning last three rows and incrementing multidimensional input names?

Having a hard time figuring this one out...

I am attempting to clone the last three rows of a table while also incrementing the names of the inputs, which are arrays.  

(I've put the code on jsfiddle jsfiddle)

To be clear, once the user clicks the "newissue" button, the following should happen:

(1) The last three rows of the button's parent table (i.e., table.subtitle-form) are cloned and appended to the table.subtitle-form

(2) The names of the inputs should be incremented appropriately:

title[0][subtitle][0] 

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is cloned as

 title[0][subtitle][1] 

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and

title[0][subtext][0]

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is cloned as

title[0][subtext][1]

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(I have the parent table cloning working as seen at the fiddle link, it's just the inner table that I'm having an issue with...)

(code also posted below)

// HTML
<div class="ttables">
<table cellspacing="0" cellpadding="0" class="title-form">
    <thead>
        <tr><th><label>Title</label></th></tr>
    </thead>

    <tbody>
        <tr><td><input type="title" class="form-text" value="" name="title[0]"></td></tr>
        <tr class="subtitle-container"><td>
            <table cellspacing="0" cellpadding="0" class="subtitle-form">
            <tbody>
            
            <tr><td><label>Subtitle</label><input type="subtitle" class="form-text" value="" name="title[0][subtitle][0]"></td></tr>
            <tr><td><label>Subtext</label><textarea class="form-textarea subtext" name="title[0][subtext][0]"></textarea></td></tr>
            <tr class="rowspacer"><td></td></tr>
            
            </tbody>
            <tfoot>
                <tr><td><button class="faux-button" id="newsubtitle">Add subtitle</button></td></tr>
            </tfoot>
            </table>
        </td></tr>
    </tbody>
    
    <tfoot>
        <tr><td><button class="faux-button" id="newtitle">Add title</button></td></tr>
    </tfoot>
</table>
</div>

//js
$('#newsubtitle').live('click', function(e) {
   e.preventDefault();
    
    var numrows = $(this).closest('table').find(' tbody > tr').length;
    
    $(this).closest('table').find(' tbody > tr:gt('+ (numrows-3) +')')
        .clone()
        .find(':input')
        .each(function() {
            this.name = this.name.replace(/\[(\d+)\]/, function(str,p1){
                return '[' + (parseInt(p1,10)+1) + ']';
            });
        })
        .end()
        .appendTo($(this).closest('table > tbody'))
        });   
    
    $('#newtitle').live('click', function(e) {
       e.preventDefault();

var numtable = $('table.title-form').length;
        $('table.title-form:first')
.clone()
            .find(':input')
        .each(function() {
            this.name = this.name.replace(/\[(\d+)\]/, function(str,p1){
                return '[' + (parseInt(p1,10)+1) + ']';
            });
        })
        .end()
.appendTo('.ttables')
    });

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