I think mine always did that too but memory is getting a bit faded.
Anti-Theft light on my dash dings and flashes if i open the door.
Car is off
In Park
Getting in, or leaving.
Fuse or battery issue? Can i reset it?
keys out and all...
The anti-theft flash is normal.
The chime is not.
I bet you can wiggle test the ignition lock with the door open and the keys out and make the chime quit. It will get worse before it gets better. A new ignition lock cylinder assembly will fix it.
Hold on there... You may be confusing two different parts.
The ignition switch is located far down on the steering column and you can't "rotate" it. It just goes straight up and down. The ignition lock cylinder can be rotated and it is what the key is inserted into.