Recovery's not a linear path. Overall, you're moving forward, but there will be dips and plateaus along the way.
If I purposely skip breakfast one morning, I'll probably be ok. If I do 500 crunches after one night of eating a little too much dinner, I'll probably be ok. Slips will happen. Relapse is not an option.
The average length of recovery from an eating disorder is 7 years. I've still got some time to reach that goal.