Case is ready to be scheduled for an interview - updated twice

[jjz]

Hi,


I was so happy when everything stared so smoothly, but .....

AOS (Local Office: Lee's Summit, MO) :

02/26/16- AOS packet sent via USPS Priority Mail (I-485, I-765)
03/02/16 - email notifying the AOS package has been received
04/01/16 - Biometrics
04/11/16 - online status changed to "Case is ready to be scheduled for an interview"
04/15/16 - online status changed to I-765 approved
05/04/16 - received EAD/AP in the mail
05/12/16 - online status changed to "As of May 12, case is ready to be scheduled for an interview." This is the second time of such change since 04/11/16.
7/18/16 - no update. online status "As of May 12, case is ready to be scheduled for an interview"

Does anyone have a similar experience with the Lee's Summit field office?

Thank you!!!!