Well as most of you should know, there have been auto bannings at CPQ. This is an in-depth guide on how to avoid it and the theory behind the bannings.
The Theory: This all comes down to packets or the information that is sent from to the game down to Nexons servers. When you lag all the information that usually continue moving to Nexons servers stop and doesn't go to the servers till the end of the lag. Meaning if an Assasin can do a max of 1k per star with lucky seven, and he lags for 5 seconds while continually attacking the same monster it will be read when sent to Nexons servers as (N) Assasin did 15k damage to a Robo in CPQ with a max of 2.xk hp. This will give you a 9~12 month auto-ban.
How to prevent getting banned: Before you enter CPQ take down Windows by going to Task Manager and ending the process Windows.exe this will take off lag coming from GUI, also turn down hp and mp monitors, and graphic quality to low to minimize all possible lag.
Hope this clears up any thoughts about CPQ.