Multiple post classes should be separated by a single space or should be in an array.
post_class("$even_odd $current_post $current_in_total");
Or
post_class(array($even_odd, $current_post, $current_in_total));
Multiple post classes should be separated by a single space or should be in an array.
post_class("$even_odd $current_post $current_in_total");
Or
post_class(array($even_odd, $current_post, $current_in_total));