Since the phones can be connected to two towers, one for 1x and one for 3G or 4G, it could create an imbalance. The phones will hang on to that 4G connection for as long as possible. So as they move away from the Kirkwood tower they hand off the 1x connection to another tower but keep the 4G connection until the extreme edge of the signal. The result is you have more phones connected than what is typically expected.
Once you have a couple of surrounding towers go live with 4G that should not be an issue. Of course it is entirely possibly they are back making adjustments and that is causing a problem too.