No limits with showcats

With the showcats parameter one can’t limit the categories with minnum and maxnum neither with number.

For instance the following code does not limit the categories. The page still shows the categories with 0 and 1 post and with more than 10 posts.

<?php ctc('smallest=8&largest=22&unit=px&mincolor=#217ece&maxcolor=#003663&showcount=yes&showcats=yes&showtags=no&minnum=2&maxnum=10'); ?>