Don't work "One minify string will contain" with css

Option “One minify string will contain” don’t work in bwp minify 1.2.2 with css.
I think you must fix this in class-bwp-minify.php:
replace this:

$this->append_minify_string($this->styles, $queued, $src, $count == $total, true, 'styles');
// If this style has support for rtl language and the locale is rtl,
// we will have to append the rtl stylesheet also
if ('rtl' === $wp_styles->text_direction && isset($the_style->extra['rtl']) && $the_style->extra['rtl'])
$this->append_minify_string($this->styles, $queued, $this->rtl_css_href($handle), $count == $total, false, 'styles');

with:

$this->append_minify_string($this->styles, $queued, $src, $count == $total, false, 'styles');
// If this style has support for rtl language and the locale is rtl,
// we will have to append the rtl stylesheet also
if ('rtl' === $wp_styles->text_direction && isset($the_style->extra['rtl']) && $the_style->extra['rtl'])
$this->append_minify_string($this->styles, $queued, $this->rtl_css_href($handle), $count == $total, true, 'styles');

http://ww.wp.xz.cn/extend/plugins/bwp-minify/