I understand your worry as even I was getting worried and when it happend it all changed within 2 days as you see....
so now I believe they are not slowing down but rather they get some cases done than update them all at once....
Also I have noticed that most of the changes in status I had happend on tuesday and monday....I think their system also takes... time to update....
Anyways these are all guesses but wish u good luck and hope you get your change in status soon
.....
keep smiling though because when it will happen u wont even realize and it will just happen so fast just like me and all other applicants who got DM n PPR this week...