I found some sort of remote start installed
I bought this car from a relative of the owner, so they didn't know why it only had one key. They key it did have had a remote starter remote with it but even though the light on it would light up, nothing would happen.
Another thing with this car is the keyless entry range for the OEM key really sucks, I have to lean across the trunk sometimes to get the trunk to pop.
I had been noticing a wire hanging from under the dash with some electrical tape on it. Didn't seem like something the factory would do, so I investigated further.
Picture below of what I found, probably the sensor for the remote start system. See the black electrical tape wrapped around it? The cars 2nd key was in there but the battery is dead. I'm guessing the system needed the key near it to enable the system.
I'm leaning towards removing the remote start system.
http://i.imgur.com/FApWJ.jpg