I thought it was something like this. Do you always go for fights where the other fighter is better in the rankings? Or do you just go with who ever is best? As I know some above your in the rankings can be as you just stated above.
I did have a save earlier which I have now got rid off due to this one, but I had a guy high up in the rankings. And when I looked for a fight noticed he was world champion without even fighting for a title and I couldn’t find why he had it. Not sure if this is a bug or it just happens.