Can only be set up six working condition? a bug?
sorry my eng so bad!
On the page of the second screenshot you have made, be sure to uncheck the option Only display statuses that are used by this tracker (I suppose you are using simplified chinese, the filed should be called 只显示被此跟踪标签使用的状态 for you) to make new statuses appear in the workflow.
thank you Felix Schäfer !