Not sure if its just me or not, since I dont see this reported already, but seems the achievement for the trade house isnt working.
In the achievement tab, it says to “make 2000 gold pieces through the trade house”. I have now made well over 10k total, and have even had one mail with 5k in sales in one go. The mail works fine, giving me the gold I made, and it looks like the trade house works in every other fashion. Just no achievements.