You can try filing it again, and you can also contact customer service.

Yes, you can use your H4 to join your spouse in the U.S., rather than using your H1b.

It takes about 30 to 60 days to get a receipt.

You will have to direct that question to a person who practices German immigration law. This site is for U.S. immigration law.

There is no legal limit to the number of extensions a person can request.

In theory that is a violation of the law and subjects a person to removal. But in practice, this never happens. As long as you did not lose any...

It seems to me that you cannot. Since you never were in H1B status, you may be subject to the numerical requirement.

In theory you could file this. However it is unpredictable how the local USCIS office would handle it.

You can check www.aila.org for names of lawyers. Meanwhile, if you simply bring a certified copy of your conviction with you, you should not have...

The I-864 includes a question about how many other I-864's have been filed. You add that to the household size.