Auto pilot tracking

[Nwdiver]

I’m having a few issues with the Garmin auto pilot oscillating while on plane, it stays on track, but bounces between port and starboard once or twice a second. Not badly, but definitely noticeable. It didn’t used to do this, but now it does. This could be self inflicted, as I’ve been trying to get the auto pilot to follow a course while using pattern shift on the Yamaha 250 (it doesn’t like anything below 50%) and have been playing with the response time.

I have put everything back to where it was and even redid both wizards.

Any suggestions?