My I-485 online status has been updated everyday

I did the second FP last Wed. This week, my I-485 online status has been updated everyday with the same message:

Current Status: Document mailed to applicant.

On May 2, 2007 we mailed the document to the address we have on file. You should receive the new document within 30 days. If you do not, or if you move before you get it, call customer service.

Does it mean anything? Why they updated the same message every day? Please advise. Thx

所有跟帖： 

• 回複：My I-485 online status has been updated everyday -doshexh- ♀ (34 bytes) () 05/15/2007 postreply 08:29:23

• 回複: Is your PD current? -puma0202- ♂ (0 bytes) () 05/15/2007 postreply 08:35:10

• Yes. but last week my NC is still pending回複：回複: Is your PD -suyuyu- ♀ (0 bytes) () 05/15/2007 postreply 09:21:19

• 回複：My I-485 online status has been updated everyday -rblu21- ♂ (144 bytes) () 05/15/2007 postreply 10:14:58