Speakers still on

When bluetooth headset connected, Media like pandora plays only on headset fine. But any notifications like texts and phonecalls play out of both speaker of the phone AND the headset.

I tried messing with settings but cant seem to understand which would make it so when bluetooth is on and a headset is connected, ALL audio including notifications and phone rings goto bluetooth ONLY. And when headset is turned off (whether bluetooth is on or not), audio goes back to phone speakers.

Did you try the following setting? :

1) Press "Alert behavior"
2) Press "Bluetooth (A2DP) behavior"
3) Press "Notifications To". Change to "A2DP only (override)" OR "Current Phone setting (A2DP only)"
4) Press "Ringtones To". Change to "A2DP only (override)" OR "Current Phone setting (A2DP only)"

If the Bluetooth Headset supports phone calls, then the headset will most likely play its own ringtone in the headset when the phone is ringing.

Similar to Wired Headset:
https://soundabout.forumotion.com/t22-stop-notification-ringer-audio-from-going-to-speaker-when-using-headset