USCIS approval puzzle ????

How do you explain there is a case file get approval in 4 years
vs
a case got confirmed in 7 days?

Is it possible to explain this scientifically ???

I could not add the screen shots. I will try later. thanks.

Why you don't put the receipt number?

does it matter? go to list of approvals. you can find tens of sample like above. this is not one unique example.

uscis process cases which are current in the visa bulletin. Probably 4 year is from india or china

"How about I-130 petitions for a Pakistani wife of a U.S. citizen?"