Notice of case recieved today but... uh oh

[KK & Jaleboy 3]

Ok, I previously posted 1/16/13, about it being 6 weeks and no NOA1. I sent our package on 12/3/12 from northern Greenland via APO regular mail and after 6 wks, thought it could have been lost. I even called USCIS a week later and talked to a live person who said he had no record of our file (but how could he really know if I couldn't reference a receipt #). He then recommended we send a whole new package. After 7 weeks, I figured it would be a reasonable move and by the time one of the packages I sent was recieved, I could just cancel the check for the other package and it would easily fall out of the system since the payment wouldn't go through. So a friend hand carried my 2nd package to mail from the US, which she did on 1/28/13 - - a full 8 weeks after the last package was sent - and still no notification.

Today I recieved TWO notices via email and text message. Both sequentially numbered (EACxxxxxxx231 & 232), both sent to the Vermont Processing Center. Does anyone think that somehow BOTH packages were processed the same day? Or has anyone recieved 2 sequentially numbered notices for 1 submittal? I'm not so much worried about the double payment as getting both packages rejected because of duplicate submittals. So far no checks have hit my bank.

Advice?