This may be related to another bug that was reported (continue page)
When editing, adding, secret combos you get some wild behaviors, like the misc. secret combos showing up on the burn page, and text showing up a crossed the misc. combo slots, etc.
I got this to happen by adding a combo to misc. 16 and then changing my mind and removing it and adding it to burn 1 (blue candle).
Going back and forth between these two pages resulted in the behavior.