我已经收到“welcome letter",但是还未收到绿卡。今天仔细读了一下welcome letter，竟然发现我的绿卡是两年“conditional"。请看如下：”Your new card will expire two years from when you became a permanet resident. By law your resident status is conditional, and you must apply to remove those conditions before your card expires."简单做了下research, 好像条件绿卡是marriage-based, 我的绿卡申请是employment-based.请问大家的welcome letter是怎么写的？象我这种情况该怎么办？是移民局搞错了吗？
非常感谢！