No this should not detrimentally impact the final decision of the case.

If you are filing the I130 and I485 concurrently you do not need to indicate a receipt number. Only if you have previously filed an I130 do you...

In the I-864 form, Does a 2 years old US citizen daughter of the principal immigrant need to be included as intended immigrant?

No you would not as she is not an intending immigrant but a USC.

What is form I-797? how can I have it?

That would be the previous approval for your mothers permanent residency. You may also submit a copy of her previous LPR card.

When will my amended approval notice be issued?

You may contact NVC to inquire further, although this timing is not a large delay.

I130 translation documents

Copies of all translations should be sufficient at this stage. Originals may be sent but generally only if requested.

It means that the case has been scheduled to an office that has jurisdiction to schedule an appointment for your I751 interview.

You must be a resident on the town in order to borrow books from a library. You may enter and browse however.

Yes and he may also obtain an employment letter from his job explaining his title, the nature of his work, and his salary.

What is the best way to obtain a visa to Pakistan? I am going to marry once arriving.

It is best to consult with an attorney who specializes in Pakistan immigration. You should be truthful when applying for a visa to any government...