I am pretty sure I know how this is happening and can recreate it but have not figured out how to fix. Taking multiple lines can occur when callers press 0 to go back to the main menu. For some reason it takes an outside line and calls our main number to get the Auto Attendant. When someone calls the office1 BCM and does that then the lines do release after the call but if they call from office2 then it does not always (sometimes does) release those lines.