No it worked the way it was designed, but I use a Misting system. If you program it to keep the humidity at 75% than anytime the humidity would drop to say 72% it would turn on the misters. It was turning the misters on every 10 mins and after a few days had created a swamp in my substrate. Which prompted and complete cleaning and rethinking how I was going to haver my mister run automatically.
So what I do now is have a timer setup and it runs the mister (and through trial and error) it stops when the RH is near 75% - 77% then it turns off the mister for 2 hours or so then runs it again for 60 sec which boosts it back up into the 70s again. It does this all day and then right when the lights go off for the night it mists one more time for about 10 sec. That little bit of humidity keeps the tank in the 70% range all night (with the lights off the humidity actually climbs some.
I just wasn't a fan of how it was trying to keep the RH up. It would of been better to set an acceptable range and when it fell outside of that range it would turn on the mister and boost it up to a predefined setting then wait for it to fall out of range again.