回复：请问大家有没有类似的情况？关于我母亲来美国的签证问题

The embassy usually double checks on all information in the application forms before officially issues the visa. Is there any mistakes on the information? But either way, they should give you an explanation. If you are in China, your wife, who's the us citizen, can go to embassy directly... see more information on the embassy website

Good luck.