Developer of Deus Ex: Revision by night and an ICT student at the Royal Institute of Technology by day. Besides liking Deus Ex I'm a Trekkie with my roots in Star Trek: Voyager.
This brush has been bugged either by the use of "merge polygons" or by copy and pasting. When the editor does either operation it does optimizations to reduce the number of links, for almost all brushes this is fine and won't hurt at all, but for some of them bad luck stikes and two different surfaces become merged into one and that also screwes up the aligment.