Duplicate Last Record When Using SqlDataAdapter.Update For Insert Command

I'm getting duplicate records for the last record in the datatable. No matter how much or how little my datatable contains row records, it always duplicate the last one for some reason. Is there something wrong with my code below? EXAMID pulling from another stored procedure, which is outputed back to a variable.

---Data Access Layer---- If dt.Rows.Count > 0 Then

'INSERT EXAM ROSTERInsertComm = New SqlCommand
sqladapter = New SqlDataAdapter
InsertComm = New SqlClient.SqlCommand("ExamOfficers_AddOfficerSpecificExamRoster", conndb)
InsertComm.CommandType = CommandType.StoredProcedure

sqladapter.InsertCommand = InsertCommInsertComm.Parameters.Add("@examid", SqlDbType.Int)InsertComm.Parameters("@examid").Value = examid
InsertComm.Parameters.Add("@officerid", SqlDbType.Int, 12, "Officer_UID")
InsertComm.Parameters.Add("@reimburse", SqlDbType.Bit, 12, "ReimburseToDb")
InsertComm.Parameters.Add("@posttest", SqlDbType.Int, 12, "Post_Test")
InsertComm.Parameters.Add("@pqcdate", SqlDbType.DateTime, 12, "pqc_date")
InsertComm.Parameters.Add("@pqcscore", SqlDbType.Int, 12, "pqc_score")

conndb.Open()

sqladapter.UpdateBatchSize = 100
InsertComm.UpdatedRowSource = UpdateRowSource.None
sqladapter.Update(dt)

InsertComm.ExecuteNonQuery()
InsertComm.Dispose()

End If

----Stored Procedure----

ALTER PROCEDURE [dbo].[ExamOfficers_AddOfficerSpecificExamRoster]

@ExamID as int,
@OfficerID as int,
@reimburse as bit=NULL,
@posttest as int=NULL,
@pqcdate as datetime=NULL,
@pqcscore as int=NULL

AS
BEGIN
SET NOCOUNT ON;

Insert Into Exam_Officers(EXAM_UID,Officer_UID,reimburse,post_test,pqc_date,pqc_score)
values(@ExamID,@OfficerID,@reimburse,@posttest,@pqcdate,@pqcscore)

END