I've been having the same issue described in
this thread, namely that when I try to load a build created with a version of Mids prior to 1.93 I get the Legacy Build thing showing up on my build despite not having any Fitness powers selected. When I try to correct this manually by taking and then deselecting Fitness powers, I lose the slots that were in those powers.
While I saw the locked thread describing this issue, I have not seen anything describing a fix (if there is one). Short of remaking all of my builds from scratch, something I am not keen on doing, I have yet to find a way around this issue on my own. If anyone knows of a fix or workaround, I'd appreciate it.
Thanks, and if this issue's solution has already been posted then I apologize for the new thread - I looked and did not see anything addressing the issue beyond the thread I linked above.