WAAS is a method of refining the signal in order to provide a more accurate location. It is done on the device, and if you have WAAS enabled, you use that part of the signal to get your fix. If not enabled, then plain basic location is still available, but just not as spatially accurate. No big deal if you're backpacking, very big deal if you're surveying or targeting.
So if your device is acting like the OP's, just disable WAAS and take the location with a small grain of salt (10-30 meters off, maybe).
So if your device is acting like the OP's, just disable WAAS and take the location with a small grain of salt (10-30 meters off, maybe).