Software bug: Once a recording task has been commenced, it can't be removed or amended, until the time period the task is finished.
The first thing I would like to recommend you is to check the user guide. You will find all necessary information as well as details about the supported features.
Download guide: http://www.blazevideo.com/guide/blazevideo_hdtv_player_manual.pdf
If you need additional information or want to make a bug report, use the Contact us page: http://www.blazevideo.com/contact.htm