The Dayparting settings mostly look correct, but there are two things to check.
First: in your screenshot, 00:00 is also marked green. If you want the song to play only from 20:00 until midnight, 00:00 should not be selected, otherwise the song is also allowed between 00:00 and 00:59.
Second, and more importantly: the fact that the song is scheduled at 11:52 AM suggests that Dayparting is not being applied when the playlist is generated. RadioBOSS needs to know the expected playlist start time and day of week in order to apply these restrictions correctly.
Please check how the playlist is generated. If it is generated manually, or if the Scheduler event does not provide the proper start time, the Dayparting restriction may be ignored.
Try generating the playlist through the Scheduler/Wizard with the correct start time, then check whether the song is still placed at 11:52 AM.