whoever installed your bypass wired it wrong, the bypay uses a factory key and an extension antenna, but should only be active when the remote start is active, the way the system is set up in you car seems that the bypass is always active, thus making the security key pointless, with about 50 seconds and a screw driver you could probably start the car......
The quick remedy would be to open the dash, find the bypass and re-wire it so it is switched on/off by the remote starter :th_thumb-up: