Have recently purchased what I thought was going to be a nice unit but, the display unit is off by 4 degrees, the sensor is by 6. I placed the unit, the sensor and two other thermometers on the same table in the same room. The two other thermometers read the same. While the acurite reads higher. The sensor is sitting next to it and reads 6 degrees difference higher only 1" away. I tested objects in the room at room temp with a infrared thermometer and they matched what the cheap digital thermometers display. Also the humidity is off between the indoor and outdoor units. Is it common for acurite to be this far off?