Queue list window question on winbox

I see that at the bottom of this window, when you are selecting “Simple queues” or “Queue tree” tab, there are two numbers:

  • x B queued
  • x packets queued

I have some MT devices which I see on the bottom values arround 30 kilo bytes together with about 12 packets queued where they both have normal variations between zero and these values. But I have one MT device that have 10.4 MiB queued and the only values that show variations are the packets, between 200 and 2000 packets queued. It never drop down, its just stuck at 10.4 MiB. So, what is the meaning of this? Is that a limit of 10 MiB only that is possible to be queued? This mean that something is full on that MT device?

Thank you.