You may well have broken wiring harness where it flexes going into the trunk. Common on these.
You might try running the trunk lid bumpers into the lid a bit to make them not stick out so far. Sticking out far enough can make the door ajar light come on.
You might try running the trunk lid bumpers into the lid a bit to make them not stick out so far. Sticking out far enough can make the door ajar light come on.