I agree with Dan. The red lines indicate that a bar setting has changed. If you press F5, you will see something about that bar that is not the default, and it’s likely tempo. Using the audio chord wizard, you want to be sure to get the beginning and subsequent bars lined up to the music, and when you do, it’s a great feature that the tempo map has been made for you.

I’m not sure what the story is with your mixer, but you always have the fall-back method of Options, Return to Factory Settings if you can’t figure it out otherwise.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.