Signing a contract does not make you any more or any less in status, or out of status.

She cannot be issued the visa before it is available.

There is no rule against it, but be aware that CIS may question why thy are spending half of the year in the U.S. if they are visitors.

Contact your congressman and also contact the ombudsman's office. They either never sent it to you or it was lost in the mail.

If they are eligible for TPS they can apply. You can file an immigrant visa petition for your mother, father and sister, but only your mother and...

You can try filing it again. Or there is an email to check with the lockbox for receipt.

Whenever you get a chance in the future you can submit it.

She can always leave the country. If she does not have a current H4 visa in her passport, she will need to apply for one in Canada.

It takes far longer than 2 months to get an interview, normally, on an I-485 application.

Could be. Perhaps he has valid legal status in the U.S. and perhaps his crime would not subject him to removal.