Blank Priority Date on EB-3 I-140 Approval notice

[souvi]

Hello,

 

I have an approved I-140 petition under EB3.  My priority date should be 03/18/2009.

 

However my I-140 approval notice has no priority date printed on it.  It is actually left blank.

 

Why would they not print the priority date on the approval notice?  Should I be concerned about it especially considering that I am trying to port from EB3 to EB2? Would I be able to retain my original priority date after porting?

 

Please advise.

 

Thanks.