That's all the youtube's apps fault. The most recent update did it and I hate it.
I'm sure they're receiving a lot of flak for it and surely they'll correct the issue in the next app update. Whenever that might be.
For now, I think we just have to deal with it.
Though, I've never looked around for an older version .apk... I might do that.
Its sooo annoying!!! I get videos in my channel feed from 2 months ago!