pagination limitation of MySQL Calc found rows

list.php

<?php /**
	 * Method to get the starting number of items for the data set.
	 *
	 * @return  integer  The starting number of items available in the data set.
	 *
	 * @since   12.2
	 */
	public function getStart()
	{
		$store = $this->getStoreId('getstart');

		// Try to load the data from internal storage.
		if (isset($this->cache[$store]))
		{
			return $this->cache[$store];
		}

		$start = $this->getState('list.start');
		$limit = $this->getState('list.limit');
		$total = $this->getTotal();

		if ($start > $total - $limit)
		{
			$start = max(0, (int) (ceil($total / $limit) - 1) * $limit);
		}

		// Add the total to the internal cache.
		$this->cache[$store] = $start;

		return $this->cache[$store];
	}