Those cameras had that run-away issue for a while. My first one had it and I had to send it back. If you just bought it last week I would take it back to where you bought it. If you have to deal directly with Bushnell, I have found their customer service to be outstanding. There is probably nothing you can do differently to fix the problem. The sensitivity setting should be set to normal unless the outside temp is very high then you may have to set it to high. Hope it all works out for you.

Blessings......Pastorjim