Why is Immigration afraid of your emigration?

You think too much. Before you submit the information 1 week, the US Immigration Bureau will send you a receipt of the information, commonly known as the file number. In the next two years, your information will be shelved, and the immigration office will have no time to receive your documents. Because they tried many applicants before you. They won't process your information until you line up. As for the telephone inquiry, it is only possible if the immigration bureau calls you, and it is not certain. Generally speaking, there is a big mistake in your information, and they will call you or ask you to supplement it more often.