The auto-unit-design feature, for some reason, spams new copies of existing units that are completely identical in all stats to an already existing auto-designed unit when military tech is researched.  This can quickly fill the unit choices and makes unit selection a big confusing unless a player looks carefully through every stat of every unit and "Retires" the duplicate auto-designed units to clear up the clutter.

In general (and this would be more of a request than a bug fix, I guess), I would really like to have a toggle that would turn off all auto-designed units.  Personally, I tend I design a mixture of practical (best attack/defense for the buck) and heavy (maximum attack/defense possible regardless of cost) units on my own, and auto designed units just clutter up my recruit panel in my settlements.