A bit of information for newer players: In the beginning, Guild Banks would auto-sort placed items just like personal banks do. There was a duping exploit and they removed auto-sorting as a workaround until the problem could be fixed. This was many moons ago.
I can only fathom two explanations as to why the workaround is still in place:
1. The devs have shelved the issue and/or completely forgotten about it.
2. They are still working on the issue, but still can't come up with a fix that works.
I really hope it's something else, because both of the above explanations are a bit disconcerting.
Victoria Lux - Templar Tank
{EU/DC}