Reading from Excel getting prompts instead of string on occasion - excel

Question

The issue i am having right now is that the first row of the data i get from the excel documents sometimes come back as prompts instead of their proper data types(only some of the cells). i have tried remaking the spreadsheets and redoing all the formatting on the excel side so i'm left to assume its something to do with the oledb class? Any information or a push in the right direction would be greatly appreciated.
Imports Microsoft.Office.Interop
Public Class Form1
Dim ExTable1 As New DataTable
Dim ExTable2 As New DataTable
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
OpenFileDialog1.ShowDialog()
ExTable1 = ConnectToFile(OpenFileDialog1.FileName)
Table1.DataSource = ExTable1
End Sub
Function ConnectToFile(path)
Dim dt As DataTable = New DataTable
Dim selStr As String = "SELECT * FROM [{0}]"
Dim dtSchema
Dim drSchema
Dim con As OleDb.OleDbConnection = New OleDb.OleDbConnection
con.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & path & ";Extended Properties=Excel 12.0 Xml;"
con.Open()
dtSchema = con.GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Tables, New Object() {Nothing, Nothing, Nothing, "TABLE"})
drSchema = dtSchema.Rows(0)
Dim Sheet1 = drSchema("TABLE_NAME")
Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand(String.Format(selStr, Sheet1))
cmd.Connection = con
Dim da As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter
da.SelectCommand = cmd
da.Fill(dt)
Table1.DataSource = dt
con.Close()
con.Dispose()
Return dt
End Function
End Class