I'm editing a very old Sib score. Tempo text on the score page reads "q = 60", but is playing much faster. I open the transport panel. The tempo slider is centred as default, but reads as "q=100" which is the speed the score is playing. Live Tempo & Live Playback are switched off. I have to pull the slider back from centre to make it show "q=60".
What might be the cause? Snippet attached.