"already banned"?

[opa_bato[o.0]]

A few times i came across some ban requests that have been answered with "already banned"
Eg.: Game host leaves a game, and normally it would take some time to report him, and for the report to be answered, and by that time, he leaves more games,...
So my question is, why does he receive just the punishment for the first game, and not for all of them, does he get a freebie for tricking your system or something?

[ek0]

If a user is banned, reported on forum and the request is approved, the moderator has to increase his ban. But there is nothing proving that the first ba is appropriate (unless it is issued by a moderator).

[ArizaelCZ]

It can happen too if you are requesting ban againts person who were permabanned in the meanwhile, or have been banned for the same situation (i.e. 2 guys posting reqeust for leaver host)

[opa_bato[o.0]]

here's an example that doesen't fit your explanations
http://playdota.eu/forum/index.php/topic,40122.0.html
http://playdota.eu/forum/index.php/topic,40123.0.html
i am sure there are more of them altho