As I understand it (with the settings you show), when you use 110.9 it will transmit 110.9. If some of your net folks were using 141.4, their squelch would close after a second, or so, because it is the wrong tone for them. Previous discussion on this topic indicates that, when the 110.9 stops, the transmit side immediately goes to 141.3 and that is what is used for the hang time or tail message if any.
Ken