so we got two letters in the mail from USCIS ppl, and they are both NOA's and giving us one year extension. no biometrics appts yet, although letter says that will come in separate form.

i am wondering why they sent us two letters, since there are two different numbers, so does that mean they filed it twice? I noticed that one form spelled his name wrong (and the other letter has his name spelled correctly), so am hoping they just realized they made a mistake so sent another one with the correct name spelling.

do i need to call them?

also the letter says, "if you have not already done so, please provide supporting documents to assist USCIS in processing your petition and to eligibility to remove the conditional basis of your permanant residence. please include a copy of this receipt notice with any supporting documents you submit. such evidence may include, but is not limited to the following items..." and goes on to list some items.

we already sent these; so i'm assuming this is just a standard letter?