[arrays] PHP array value passes to next row

I have an array building multiple instances of the following fields:

<div class="checkbox_vm">     <input type="hidden" name="fk_row[]" value="<?php echo $i; ?>">     <input type="hidden" name="fk_id[]" value="<?php echo $vehicle_feature[$i]->fk_id; ?>">     <input type="checkbox" class="checkbox_veh" id="checkbox_addveh<?php echo $i; ?>" <?php if ($vehicle_feature[$i]->check) echo "checked"; ?> name="feature[]" value="<?php echo $vehicle_feature[$i]->id; ?>">     <label for="checkbox_addveh<?php echo $i; ?>"><?php echo $vehicle_feature[$i]->name; ?></label>     <input type="text" class="" id="input_addveh<?php echo $i; ?>" name="featureInput[]" value="<?php echo $vehicle_feature[$i]->fk_value; ?>"> </div> 

The following actions work as intended:

• Checking a checkbox and enter text in the input field creates a new record
• Editing the text in an input field (that still has a checkbox checked) saves the changes
• Unchecking a checkbox removes the record/row from the database

This is the problem:

• If you UNCHECK a checkbox and save, whatever text/value was in the input field next to it will then be carried over into the next row in the array

Example: the 3rd checkbox had a value of 3, and the 4th checkbox had a value of 4. If you uncheck the 3rd checkbox then save, the 4th checkbox's value is now 3. And every row/record after that is updated to the previous row's value.

Here is the script:

function saveVehicle($option, $task){     global $database;     $fk_row = $_POST['fk_row'];     $fk_id = $_POST['fk_id'];     $feature = $_POST['feature'];     $featureInput = $_POST['featureInput'];     for ($i = 0; $i < count($fk_row); $i++) {         if (isset($feature[$i])){             if ($fk_id[$i]){                 $database->setQuery("UPDATE #__vehiclemanager_feature_vehicles SET fk_vehicleid = $vehicle->id, fk_featureid = $feature[$i], fk_value = '$featureInput[$i]' WHERE id = $fk_id[$i]");                 $database->query();             } else {                 $database->setQuery("INSERT INTO #__vehiclemanager_feature_vehicles (fk_vehicleid, fk_featureid, fk_value) VALUES ($vehicle->id, $feature[$i], '$featureInput[$i]')");                 $database->query();             }         } else {             if ($fk_id[$i]){                 $database->setQuery("DELETE FROM #__vehiclemanager_feature_vehicles WHERE id = $fk_id[$i]");                 $database->query();             }         }     } }