I get the same kind of error. I use the sound trigger for my laundry room. The goal is "if I have still sound, laundry is not finished, else it finished !".
For that, I made the following : power -> sound sensor -> led -> cloudBit.
It works well but when a sound is trigger, it goes UP for 3 or 4 seconds and then goes back to initial state and listen for sound and so far...
It goes to hundred of IFTTT messages such as "UP - Down - UP - Down" during hours... Is there any way to get a non-flapping signal when a sound is trigger ?
Thanks in advance for your help or some kind of advice,