Apps don't sync properly with Notification Center and across devices

[zampe]

This is not new, it's been around since Notification Center was integrated into ios but isn't it a bit crazy that after all this time most apps STILL do not sync properly?? Even big name apps like Instagram and Facebook? Notifications have to constantly be cleared manually even after you've gone into the app and seen them all. Notifications don't clear from multiple devices in sync. These companies are piling on ridiculous features while neglecting the most basic and essential ones. Does this not annoy everyone to no end??