"Duplicate notice was mailed" weird status

[alex4]

Hi,

 

After one year of NOIR response sent to uscis the status was updated recently on Jan 15th 

as " We stopped the revocation or cancellation of your case. We mailed you a decision notice."

 

on Feb 9th the status again changed to " Duplicate notice was mailed"

 

I am worried now as I have never seen this kind of status.

 

Please help me

 

 

[pontevecchio]

If a Lawyer was involved maybe they asked for another notice? having misplaced or lost the original one or never having received it.