Dear Pappy Skoorb,
Do you happen to have sensor that is white and in the shape of a candy bar? If so, that is the "TOWER" you are seeing on your account. If you do not have one of those sensors, it may be that the bridge is picking up a nearby sensor. You may delete that by locating the red circle with the white arrow in the left of the window.
If you are requiring further assistance, please contact AcuRite Customer Support at 877-221-1252.