Ah, I see. If you stop with Return / Enter it stops at the actual play position. If you use Space or F12 instead of Enter it gets back to from where you started. If it does not uncheck Options -> preferences -> genearl -> "Spacebar and F12 Play/Pause instead of Piay/Stop
With Sound Forge Pro, the PB position is probably; "Options> Preferences> General> Spacebar and F12 Play/Pause instead of Play/Stop" .. or .. "Options> Seek cursor on playback"
"How to get rid of this file preview track" > I think you are referring to "Overview", that can be hidden in the "Options> Data window" menu.
btw@ben-sax , welcome to the Sound Forge community