On the ISBoxer website is a page titled "Is Multiboxing with ISBoxer allowed?" One section of the page is aimed specifically at Eve Online players to convince them that CCP has no problems with the use of ISBoxer. The TL;DR of the logic of the argument is:
- User was banned for using ISBoxer.
- User then shows the same actions could be performed mechanically. See Kotaku and Gizmodo for the famous story.
- CCP issues post on forums stating that multiboxing programs are allowed as long as they follow certain guidelines.
- ISBoxer follows the guidelines.
Hopefully this answers the question of why CCP would ninja edit a post on the old servers.
Update: I just reviewed the OP of the forum thread. The player in question was not banned for using ISBoxer as is stated in the Lavish Software marketing materials. The player was using Synergy, open source software that allows a user to move the mouse across multiple computers and move the keyboard functionality. I will try to be more careful in checking my sources in the future.