Bought the exact amount it told me and now I have:
Energy Volley Offense Weapons X01,921
Maximum Volley Capacity X01,920
Energy Shields Generators X5,121
Maximum Shield Capacity X5,120
One shield and weapon above my max capacity. Got MS tech level 4, so it might have something to do with the game rounding the numbers up or down...
Not even sure it's considered a bug, but I thought I'd report it anyway



