I had a similar experience recently. I knew I wasn't doing well in recent months, and still the MRI at the end of December showed an improvement (fewer lesions than in 2001). Whoopee! Celebrate! I get to stay on Copaxone because it's "obviously working" as the neuro stated.

I had a really interesting fall a few weeks ago (no broken bones--celebrate!) with my glasses bent all out of shape, a cut, a black eye, and several large bruises.

That's just an example of why I know that an MRI doesn't have much of a relationship to a person's symptoms--and the experts admit that.