USCIS NSC EB1A case 状态变化看不懂

http://www.mitbbs.com/article_t/Immigration/33530011.html

发信人: lamdas (一股脑儿), 信区: Immigration
标  题: USCIS NSC EB1A case 状态变化看不懂
发信站: BBS 未名空间站 (Mon Jul 13 14:47:51 2015, 美东)

上周四网站显示PP request received，周五case was approved，律师收到EMail
Notice，上面status是：Post Decision Activity。周末网上状态没有变化，一直是“
Case was approved”。今天早上查看，发现状态变成 “Case Was Received and A
Receipt Notice Was Emailed”，下面写着：

On July 13, 2015, we received your Form I-140, Immigrant Petition for Alien
Worker , Receipt Number LINXXXXXXXXXX, and emailed you a receipt notice. It
is being processed at our Nebraska Service Center location. The notice
describes how we will process your case. Please follow the instructions in
the notice. If you move, go to www.uscis.gov/addresschange to give us your
new mailing address.

请问这是什么意思，有没有朋友遇到相似的情况？我的case到底是approved还是没有呢
？