Regarding the labelling mistake on the Live at the BBC album (TOL labelled as Old Grey Whistle Test on 31/01/1981 rather than Dortumd 19/12/1980), it is worth noting that the label is not completely untrue.
Indeed, on BBC2 on 31/01/1981, the OGWT show focused on the Dortmund Rockpop event:
http://www.tvpopdiaries.co.uk/1981.htmlBBC2 Old Grey Whistle Test 12.00 - 12.40 am
Dire Straits (Rock Pop, Dortmund)
Talking Heads (Rock Pop, Dortmund)
The show is not available, but we can safely assumed that with 40 minutes to share between DS, Talking Head and the chatting of the show, no way the full DS show could be shown, and that only TOL was.
In 1995 when they made the album, they just found the master tape of the OGWT show, and they didn't look further, that's the way they labelled TOL.
A pity they didn't have the full Dortmund show to release, I would have loved to have those great versions of DTTWN, Lions and News on disc. Now we have the videos on the official YT channel, which is good, albeit in mono.
A real pity that it seems that no stereo recording of the great OL tour exists. Maybe they have Werchter soundboard in good quality somewhere, with Angel of Mercy? On the available bootlegs the quality is not good, even if it is a soundboard, News is out of tune, that ruins it...