View difference between Paste ID: jYjuzg6G and Wa3deaUy

 First Product, with pre-existing metadata in _cp_array:
 
 Product ID: 421
 No SKU Change
 No Price Change.
 Table Rate Prices Updated.
 array ( 'state' => '1', 'quantity' => array ( 0 => '11', 1 => '100', 2 => '250', ), 'table_price' => array ( 0 => '15.75', 1 => '14.94', 2 => '14.15', ), )
 'a:3:{s:5:"state";s:1:"1";s:8:"quantity";a:3:{i:0;s:2:"11";i:1;s:3:"100";i:2;s:3:"250";}s:11:"table_price";a:3:{i:0;s:5:"15.75";i:1;s:5:"14.94";i:2;s:5:"14.15";}}'
 
 Note the last value for table_price - 14.15
 
 After running function, the data in the DB for that product's _cp_array:
 a:3:{s:5:"state";s:1:"1";s:8:"quantity";a:3:{i:0;s:2:"11";i:1;s:3:"100";i:2;s:3:"250";}s:11:"table_price";a:3:{i:0;s:5:"15.75";i:1;s:5:"14.94";i:2;s:5:"14.16";}}
 
 Note the last value for table_price - 14.16.
 
 Second product, without pre-existing metadata in _cp_array:
 Product ID: 412
 No SKU Change
 No Price Change.
 Table Rate Prices Updated.
 array ( 'state' => '1', 'quantity' => array ( 0 => '11', 1 => '100', 2 => '250', ), 'table_price' => array ( 0 => '7.80', 1 => '7.35', 2 => '6.85', ), )
 'a:3:{s:5:"state";s:1:"1";s:8:"quantity";a:3:{i:0;s:2:"11";i:1;s:3:"100";i:2;s:3:"250";}s:11:"table_price";a:3:{i:0;s:4:"7.80";i:1;s:4:"7.35";i:2;s:4:"6.85";}}'
 
 After running function, the data in the DB for that product's _cp_array:
 a:3:{s:5:"state";s:1:"1";s:8:"quantity";a:2:{i:0;s:2:"11";i:1;s:2:"12";}s:11:"table_price";a:2:{i:0;s:4:"3.00";i:1;s:4:"2.00";}}
 
 Both of the above functions have been run multiple times, with the same result every time, even though the array '$unserialized' stays the same every time.
 
 The below code is responsible for updating the product's _cp_array:
 if(update_post_meta($id, '_cp_array', $unserialized))
    echo 'Table Rate Prices Updated.<br />';
 else echo 'No Table Rate Change.';