my Garmin Forerunner 235 is intermittently recording my sleep, with no rhyme or reason as to why it will record three days, skip two, and then record four. Also, it only records my sleep within the “set hours” of my sleep time. Is there a way to fix each of these issues, and do I need to expand my sleep/awake hours if I am going to be sleeping outside of the set sleep/awake hours?