Do not use P2P Queue as a default queue

[ssjoco]

You have to select a default queue. This queue catch every traffic without a rule, however, I have found a strange bug.
If I select the P2P (it has the lowest priority) as a default queue, then the ping became very high (5-800ms) moreover some packet lost. The traffic was minimal. Finally I selected the OtherHigh queue as a default and the ping went back as soon as I pressed the Apply button.
I have a rule to catch all ICMP (ping) traffic to the High queue, but both ping from winows and Quality in the RRD Graph said the same thing.