Case Approved

I changed my status from j1 to b2
hi Changed my visa from j1 to b2 in march, and my visa just approved one week ago, bit the issue was the validity, was for one day, the same.day I've received. what that means? the same day I've applied for extantion, and I've received the file " action of notice" but my recipt number is not recognized. is that's normal? should I worry?

F, M

Change status to the F or M academic or vocational student categories

Días totales: 514 días
Case
2021-11-02
2023-03-31
I-539
514 días
Texas Service Center: I-539