First of all absolutely not your fault. The system I initially implemented was a bit flawed for the reasons you outlined. In the current build that you played adventurers assign their highest score to their primary attribute, Clerics = Wisdom, Rangers = Dex, etc.
There is no feedback in game telling you that which is a problem. I have since added this information in several places. I put it on the treasures, I made character sheets for each class.
In addition I think it is interesting if each class also assigns their lowest score to a specific stat, so it is more easy to make a strategy.
I have also ramped up early bartender serving speeds to better keep up with tables, so its not quite as fiddly.
This update should be out in the next week. Thanks for playing and sorry for the headaches :-)