Whenever I play a song, even if the BPM data is already there (I've manually input many of them in iTunes), the BPM is automatically recalculated. This is not always bad, but it often halves the BPM. I know I can go up to the menu bar, click on Table-1 or Table-2, and then Double or Half the BPM, but the problem with that method is that it only changes temporarily. If I play the song again later, it goes back to the original calculation. Is there any way to override the BPM calculation permanently, so that it won't keep changing back?