863211请进 还是post decision activity的问题

863211 我今天刚刚收到这封信：不知道你以前有没有碰到过这种情况。我这是亲属移民，又不是婚姻移民，怎么这么麻烦，真是折磨人，welcome notice是19日发的，下面这信是23日发的。非常感谢！

After review ,we have reopened the above application or petition ,or reconsidered the decision

previously issued.you will receive a notice under separate cover once all action has been completed.