Just to let you know. I have looked at the page www.nutv.dk/bigbrother
which list almost all the aired episodes. However the list is not complete, but they should be aware of this issue. Further they call the episodes just by the date it was aired, but the current registrated name on TheTVDB makes more sence. Here they're called 'Dag x' - which means 'Day X'. However the issue with the current name on the episode is that it referces to the day it was aired instead of the day it's about. The episodes is always about the day before, and in the episode they also write that it's the previous day. As an example the episode aired February 1st, 2012 is about Day 2 (is written as text on the screen inside the show), but in TheTVDB it's called 'Dag 3'.
Hope this gives some more detailes so this can be registered correctly.