As to the original problem - having to "rewind" the song before dragging the next track?
Interesting, I had never heard (or needed to do that) before.

As to the R/T solo being off . . .

Are the rest of the tracks Midi or R/T?

Do any of the tracks have a drum-click count-in?

Is it off by just a little (meaning a beat or so) or off by like a whole measure?