My account is misbehaving.

Question

Anytime I code and go back to do something else, anytime I return, the level at which I've coded to goes back again. So I have to solve the questions again and continue. But it repeats again.
Before I realized that I didn't activate my account before starting. I've done it and is fine now. But it has repeated again and I don't know what else the problem is. Can someone please help.