The AH functions here are atrocious.
More to the point why it should be something they fix: The AH is something almost all players will use, whether to try to buy or sell. They will also use it fairly early on when they start playing. Game "problems" for new players are not single issues, they remember things that are bad or difficult to use, as well as bugs.
The earlier they start encountering things like this, the earlier they get the idea that the game won't be what they want to play very long. The game may be absolutely perfect from level 5 up, but if the content and functions before level 5 are so crappy as to drive people away, you won't have enough people to make it to level 5 to see the perfection (no, that wasn't literal.. i'm not saying the game is perfect form level 5 up).
All of this would be moot IF there were no other games out there, but that's not the case. An AH, in all games that have them, is a highly used function.