Data Column Refresh After Unpivot

The report is now 10-29-2018.  I went ahead and changed the data source now. The new code is below:

let
    Source = Excel.Workbook(File.Contents("\\bosch.com\dfsrb\DfsUS\loc\Ply\CC\Eng\DA-EPG-NA\DA-EPG-NA-Manager\TREC\10-29-2018\981259_TREC_Report_10-29-2018.xls"), null, true),
    Export1 = Source{[Name="Export"]}[Data],
    #"Changed Type" = Table.TransformColumnTypes(Export1,{{"Column1", type text}, {"Column2", type text}, {"Column3", type text}, {"Column4", type text}, {"Column5", type text}, {"Column6", type text}, {"Column7", type text}, {"Column8", type text}, {"Column9", type text}, {"Column10", type text}, {"Column11", type text}, {"Column12", type text}, {"Column13", type text}, {"Column14", type text}, {"Column15", type text}, {"Column16", type text}, {"Column17", type text}, {"Column18", type text}, {"Column19", type text}, {"Column20", type text}, {"Column21", type text}}),
    #"Promoted Headers" = Table.PromoteHeaders(#"Changed Type", [PromoteAllScalars=true]),
    #"Changed Type1" = Table.TransformColumnTypes(#"Promoted Headers",{{"Employee / Facility Res-Grp", type text}, {"Project No.", type text}, {"Project Description", type text}, {"PFP", type text}, {"Order Category", type text}, {"WPI No.", type text}, {"Task ID", Int64.Type}, {"Task Name", type text}, {"Org Office", type text}, {"Resource Group", type text}, {"Kind of Activity", type text}, {"Jan 18", Int64.Type}, {"Feb 18", type number}, {"Mar 18", type number}, {"Apr 18", type number}, {"May 18", type number}, {"Jun 18", Int64.Type}, {"Jul 18", type number}, {"Aug 18", type number}, {"Sep 18", Int64.Type}}),
    #"Unpivoted Columns" = Table.UnpivotOtherColumns(#"Changed Type1", {"Employee / Facility Res-Grp", "Project No.", "Project Description", "PFP", "Order Category", "WPI No.", "Task ID", "Task Name", "Org Office", "Resource Group", "Kind of Activity"}, "Attribute", "Value"),
    #"Renamed Columns" = Table.RenameColumns(#"Unpivoted Columns",{{"Attribute", "Month"}})
in
    #"Renamed Columns"

Eventhough I changed the source it did not update the values. After looking at the coee I noticed that it stops at "Column 21" so I added in {"Column 22", type text} and it also stopped at "Sep 18" and I added in {"Oct 18", Int64.Type} and it did not pull the new data.