don't know why i've never noticed it before, but quest 7 doesn't have any silver treasure.

but it lists silver treasure chests.

is this a mistake, I don't see anything in the faq. or is there only 2 bronze and 1 gold? looks to me like the bronze in area 3 should be silver.

It's a copy-pasta error. The treasure chart is reused from a previous dungeon. The treasure on the map is right, there just shouldn't be a listing for the level that isn't represented.

strange that's not in the FaQ since it's from the original release.

Nah, there are a lot of rules to mess up and fix, this is low priority, especially since it just is superfluous, rather than contradictory, wrong, or game breaking.