Hey @YouTube
I would like to ask, why I don't get notified every time, when channel, that I subscribe and have bell icon on...it's really annoying
Check your bell settings for that channel and see if you've opted-in to receive all notifications? You may be on the default setting, which is to receive notifications occasionally. Here's a guide to help check that plus your app and device level settings: https://goo.gl/giVA8o