I ordered 2 different sizes black gold in us 10,5 and the bred in 11,5 as I wasnt sure... gold looks and fits better imo. Yes I also had issues to cart and to checkout on release day.
If you can go tts with UB you have normal feet. If you have to go half size up with UB you have wide feet.
Normal feet = full size down from UB size when buying NMD
Wide feet = half size down from UB size when buying NMD