Waratah's post was not just an advertisement of his abilities, but a deliberate attempt to try to steal a customer from Makc_RU, from a thread Makc_RU created in which to discuss the work with his client. Furthermore, his post was, and we have past history to show this, a snide attack on Makc_RU.
Lately those two forum members have attacked each other in the Media Center regularly, often breaking the forum rules while doing so. Warnings were given both in threads and in PMs to both members. These warnings were ignored, and both received tempbans. After this, Makc_RU had significantly lower amount of fighting, rule violations, etc. Waratah's behavior was unchanged. His tempban was issued for the reason stated, as well as the behavior he had been exhibiting between the two tempbans he received. Further actions are being considered while we take into account his behavior in that section over the past year. It has not been pleasant.
Makc_RU has also since received a 2nd tempban for his behavior in deliberately trolling and insulting Waratah. Both forum members are currently under review taking into account their history. These two forum members are the sole reason for the moderator team beginning a crackdown on the Media Center section.
This should explain the first part of your question.
As for the case with the Mimic forum account. While it is perfectly acceptable to debate your sanction in the thread, this should not be done during the course of your tempban. The reason for this, is that tempbans are meant to cover all of your accounts. However, tempbanned members still have full PM rights, with which they can discuss the issue with the moderators, or appeal to the admins. After the tempban is up, they can also pursue the issue in their sanction thread.
Lastly, I'd like to remind everyone, that tempbans require the approval of both the moderator giving the tempban, and one other (and we require that neither of these people are involved in the thread/violation), and we encourage new moderators to have the approval of two others instead of just one. This is not the case of one person thinking they did something bad and acting on it. We looked at the history of these two forum members as well as the listed offense, and, in these cases, we had 4 different mods/admins in agreement, with more agreeing post-ban on the action that was taken.
There is nothing fishy here, even if it looks that way. These two forum members have taken repeated advantage of the minimal moderation of the Media Center section, breaking rules, flaming each other, and insulting people in that section, for a very long time. Both of them know quite well that they have been doing this, and know when and where they have been doing this. The only surprise was that it took the moderation team so long to act on this situation, which stemmed from the problem that few of us are active in the Media Center, which resulted in little moderation of the section, along with the lack of documentation/record keeping of offenses of these two until recently (when we started the MC section crackdown).