For the devices on the bandwidth monitoring screen, it seems to me as if the wl0 and vlan0 interfaces are recording the data they are sending to the internet as RX (receiving) and the data they receive from the internet as TX (transmitting). But on the ppp0 (or vlan1) it is the other way around, it correctly shows what is being sent to the internet as TX. Why the inconsistency? Wouldn't it make logical sense to have them all the same? Because I think of an interface as an object, a behaviour it is doing.