Confirmation of successful upload is slow by two files.

I am using winscp in a vb.net project, when I transfer some files and use transfer results code to get the filename uploaded with time-stamp , but I receive the confirmation after two files already uploaded.
Example lets take three files 1.jpg,2.jpg,3.jpg
When I am uploading these files the upload successful message should come after very file uploaded, but the message is coming when 1.jpg , 2.jpg already uploaded and 3.jpg just begin to upload .

Show us your code.