Hi there, this doesn't seem right. Just to confirm, do you see videos for those channels in your subs feed? Does it appear you’re subscribed on those channels pages? Keep us posted to help you further.
Thanks for confirming. We sometimes send notifications for channels we think you’ll be interested in. Have you tried disabling these notifications? Here's how: Tap the menu button > Settings > Notifications and uncheck “Recommended videos”. Let us know if this works.