One possible way to verify the sequence errors is to filter the pcap on the stream ID then save just the streams displayed to a text file.
Use excel to filter out only the sequence numbers.
Copy only Seq Numbers to new spreadsheet and sort the column with the numbers then use an equation to determine the difference between each consecutive number.
If the value = 1 then there is no loss or duplicates.
If the value = 0 number then there is a duplicate.
If the value > 1 then there is loss.