Okay, go to your account setting by going to "assignment cart" and the notifications and you can change it back.
1. Click dashboard in your assignment cart.
2. Then I think it might be under alerts or something similar.
No, no it's under Points program. Click that and you'll see the option to turn on notification. It's near the top saying "turn off after certain limit or turn off permanantly." Click that and it should reverse it, leaving it on. Sometimes they just are turned off when you login and you have to re-turn it on.