美国b2签证ds156表格填写的问题

打电话询问 表格不能空着 没有的要填上NA or None

1.但曾用名 我填NA后，表格最后会出现：
FILTERED NAMES
Names that an applicant has almost certainly entered in error such as 'NONE' or 'NA' have been removed by the EVAF software from the data in the 2Dbarcode. In the unlikely event that an applicant has a name like 'NONE' or 'NA', you will have to enter the name in NIV or RDS manually. The following names have been filtered.
这个不知道有影响吗。。。

2。选项里选了no的 后边的空里还用填写NA吗，比如是否去过美国no 那下边的何时何地还用写NA吗

3。时间怎么办？没有配偶的话，配偶的生日填写不了NA，是否就空着？

4。157表格是否也要NA?