Basically because there are 8 teams from 4 countries fighting for a spot in ro16 (Taiwan, Japan, Hong Kong, and Canada), there are 4 extra slots to be filled by the 4 next most qualified teams based on SDR. Those teams moving on are Germany A (#17), Indonesia (#19), Spain (#20), and Macau (#21). The reason USA B is crossed out is because technically they are suppose to move on to ro16 because they rank #18, but since USA A already qualified and they did not, there is no reason for the teams to face each other since USA A will be representing USA in ro16.