OPT奇怪的timeline(1890064xxx)

根据https://www.uscis.gov ：

12/11: case was received (至今没变化)



根据https://myaccount.uscis.dhs.gov ：

12/13: We received your case
3/23: We are producing your card and will mail it to you
3/27: We approved your case
3/27: We mailed your card to you



详细经历：

12/4：USPS寄出材料
12/11：case was received
12/14：收到email说case was received
3/12：网上提交case inquiry（第91天）
3/15：收到inquiry回复说under review
3/23：早上查myaccount.uscis.dhs.gov发现还是received，打客服电话然而并没有什么卵用，打完再查居然发现状态变成producing card了（第102天）
3/27：状态变成了mailed
3/28：注册了USPS的informed delivery
3/30：收到EAD卡，但是当天早上并没有收到informed delivery的消息
4/2：收到approval notice

恭喜LZ! 这没啥奇怪的，前一个网站系统早就瘫了没有更新了……

恭喜LZ, informed delivery一直没消息吗？

LZ经历和我差不多。
我是12/22/17 USCIS收到资料；然后1/17/18，说是mail officer没能deliver成功。（不是平信吗？为什么会要deliver？很奇怪）；1/24/18提交inquiry，然后3/30/18收到新卡。但是，但是，网上的status还是“Notice Was Returned To USCIS Because The Post Office Could Not Deliver It” （WTH）

都是玄学，都是玄学。现在闹心等抽签。。。攒RPing

我是66XXX, 4/4还是显示case was received.