Is there any way to control the sensitivity of the alarm or is it a simple on or off choice?
Edit: how bright is it when your camera switches from night to day?
If it's quite bright you could try adjusting the change over to occur before it gets so bright but still bright enough to no longer be in night mode.
nah, that won't work either, as cars drive down the street at anytime during the night, which switches the IP CAM from night mode to day mode for a minute or 2.