you are not eligible for adjustment of status if any of the following apply to you:
4. Your authorized stay expired before you file this application.
-Continue to read in this Section:
6 Your failed to maintain your nonimmigrant status........, unless you are applying because you are:
A. An immediate relative of a US citizen (parent...).
如果他们黑下来一个月,就是 authorized stay 过期了阿,这个怎么理解?