Is it a known feature that I can look into ladder games against myself when I am sitting for my opponent?
Well, in this instance it was not an issue, since I was sitting for a team mate who just happens to be my opponent in one of the tournament games. Of course, another team mate was sitting that particular game, while I sitted other games of that player. Our team has shrunk to 4 active players, so we never have a single player that manages to sit all the games of one player that is away.
Anyway, out of curiosity, I clicked on the game and was surprised to find it loading. I immediately closed the browser when the minimap started to appear (the game is still at an fairly early stage, so I don't believe an advantage was gained).
Bug, or a feature? After all, I was selected as a sitter, and one should only choose trusted sitters anyway?!