i checked the demo and videos of the bug ,the conclusion is:
Utor was right by banning you, it was a clear wallhack. however it wasn't by using cheats, but by using bugs as an advantage. you should report this bug to the admin staff. now lot of players use bugs as an advantage, like high/low resolution as no somke, but we don't ban for that, it isn't the fault of the player if the map has bugs ! and there is no rules that forbid/specify the use of software or OpenGL or not.
UNBANNED