Virt channel as a source

If I use virt channel for complex mixer and use it as a source for normal channel, I can't get values more that 100%. Virt channel in a box on main screen show values up to 120%, but normal channel cut this to 100%. Result - dead zones at max travels. I don't think it's normal.

Also, boxes at main screen accept up to Virt1 channel, no more. Bars at main screen accept up to Virt10.