Barcode scanner with Quantity

Hi,

I have barcode scanner with inventory option where i can add quanatity. I am trying to export these data directly in invoice screen. It works if there is one records and moves to first column in next row but with the multiple records it messed up sometime cursor doesnt move to first column of the next row. i have attached the screen for barcode scanner export format as well as the invoice screen . While it perfectly works in EXCEL and correctly load data on particular column.  Can you please let me know the order of the TAB in invoice screen. and any other settings to be made. 
As you can see, with the same settings one record works fine, while more than one records doesn load the data in the correct column. 

Thanks