Can't suppress notifications

I love your app and site, but the notifications have always been somewhat of a mess on my Android phones over the years. 

First, there's the bug in which old notifications that have been cleared, still show up on the list of existing notifications in the Android pop-up. Then for the longest time, notifications just didn't happen at all. Now, notifications seem to be back, although somewhat inconsistent, but the first issue is still there, and now, I can't suppress sound or vibration when I get SA notifications! So even though I've obviously turned off sound and vibration in the settings, I still get a double vibration and sound every time I get a notification... which is too often.

Yes, I have cleared app data/cache more times than I can count. Yes, I have reinstalled often.

The app has so much to offer, but you guys really need to clean up the bugs. 

Thank you.