Judging by the symbology and the errors I noticed, it looks like they are overlaying current airspace data on top of partially corrected old ONCs/TPCs. For example, LKHK is still marked as a military aerodrome although it has been civilian for over 10 years, and EHSB (closed in 2008 and partially demolished by now) is still on the map with its former tower frequency. On the other hand, some corrections have been made - for example, LKML (closed) is not on the map, while LKCB (was closed, but recently reopened) is there.