The clock sound preferences now stay checked/unchecked as you choose.
Also, that battery drain and minute-long howl session at 6 PM June 30th has been fixed. Turns out, they were related. Apparently, I had coded the app to cycle seconds, minutes, hours, and days, but not months! So yesterday at 6PM the app thought it should update itself (i.e. switch from the night mode to the day mode) at 6AM...July FIRST! Then the phone would get this alert "Hey, update that widget!" and it would do the same thing, over and over. At 6:01 PM, the sound would stop, but the app would keep refreshing in the background.
Such a simple bug - took me hours to find it. >_<