loss level on xbox

Hello 

I've been playing wrc ea on my Xbox

I ran the game today and the last run was a week ago

I was surprised my level on level 1

I was on level 5 A week ago 

I saw that the stages that I played have a green sign on them

I don't know what happened.

I didn't rest the game

Did this thing happen to anyone?

And can I regain my level ?