Invisible spam

I'll be practicing my math that I need to learn for 6th grade because I'm about to be part of an advanced math. Then, I'll see a notification.

Naturally, I'll click on it-

Then therey'll be stuff I already viewed and is checked as seen.

This is extremely annoying, and it happens nearly EVERY SINGLE TIME I GO ON KHAN. May you please fix this?

Best Regards,
Ponyta303