I too do not see what the issue is. It seems to me that Aurvandil has been deemed a clan because it is a fairly new realm to Dwilight and was declared an enemy of Madina, they went to war and Madina is losing badly.
No. It was deemed that there is a clan in Aurvandil because there was a large influx of players from Averoth and Thulsoma, and after that happened, their military and economic performance changed from pretty average to hyper-efficient.