Passing checkbox values to php - missing values - php

Question

I am having an issue where we cannot join up our checkboxes with the other fields being passsed.
If we only check the second checkbox it will take the value of the first row select box.
The rows are joined up by the date e.g.2014-06-02, 2014-06-03
HTML
<input type="checkbox" name="date_choice[]" value="2014-06-02">
<select id="event_start" name="event_start[2014-06-02][]" onchange="area_choice_click()">
<option value="">Start Time</option>
<option value="01:00">1.00AM</option>
<option value="02:00">2.00AM</option>
<option value="03:00">3.00AM</option>
</select>
<select id="event_end" name="event_end[2014-06-02][]" onchange="area_choice_click()">
<option value="">End Time</option>
<option value="01:00">1.00AM</option>
<option value="02:00">2.00AM</option>
<option value="03:00">3.00AM</option>
</select>
<input type="checkbox" name="date_choice[]" value="2014-06-03">
<select id="event_start" name="event_start[2014-06-03][]" onchange="area_choice_click()">
<option value="">Start Time</option>
<option value="01:00">1.00AM</option>
<option value="02:00">2.00AM</option>
<option value="03:00">3.00AM</option>
</select>
<select id="event_end" name="event_end[2014-06-03][]" onchange="area_choice_click()">
<option value="">End Time</option>
<option value="01:00">1.00AM</option>
<option value="02:00">2.00AM</option>
<option value="03:00">3.00AM</option>
</select>
PHP
foreach($_POST['date_choice'] as $key=>$team_id){
$event_date = $_POST['date_choice'][$key];
echo"$event_date";
$event_start=$_POST['event_start'][$event_date][$key];
}