[Plugin: Auto-Schedule Posts] Hide posts and interval is not set properly

The plugin submit the posts, but once they are submitted, they are not visible in post list. You can see them from plugin configuration. It’s pretty much ok, but I wanted to set interfal (in minutes, the first field from the configuration) but when I set it to 21600 which is 15 days it doesn’t affect the cheduled date.

http://ww.wp.xz.cn/extend/plugins/auto-schedule-posts/