I think they lost your documents then discovered what happened, but after long time then they asked you the documents and process fast your application without any pcc,aip,approval letterTotally agree with you, it is strange! I lived in Saudi Arabia and the Unites Stated and they never asked me for PCC from any of them!! What’s also stranger is that the only things they asked me for are my “Basis of Claim” and “RPD decision along with the reasons” which I have never heard anybody getting asked to provide.
This is my analysis


You are lucky.