Sort is not applied once column is expanded

Hi I have this Connection Query that contains a column with a list using this formula :

let
    Source = Table.NestedJoin(#"Nom Soumission", {"OV_OBJECTPART"}, #"M-Add02: ID Add+M-Add01", {"OV_OBJECTPART"}, "M02 : ID Add+M01", JoinKind.LeftOuter),
    #"Expanded M02 : ID Add+M01" = Table.ExpandTableColumn(Source, "M02 : ID Add+M01", {"Num+Date"}, {"Num+Date"}),
    #"Sorted Rows" = Table.Sort(#"Expanded M02 : ID Add+M01",{{"Num+Date", Order.Ascending}}),
    #"Grouped Rows" = Table.Group(#"Sorted Rows", {"OV_OBJECTPART"}, {{"Addenda", each _, type table [OV_OBJECTTYPE=number, OV_OBJECTPART=number, Nom projet=text, #"Num+Date"=text]}}),
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each Table.ToList(
    Table.Transpose(
        Table.Distinct(
            Table.FromList(
                Table.Column([Addenda],"Num+Date")
            )
        )
    ),Combiner.CombineTextByDelimiter("; #(cr)")
)),
    #"Extracted Values" = Table.TransformColumns(#"Added Custom", {"Custom", each Text.Combine(List.Transform(_, Text.From), "#(cr)#(lf)"), type text}),
    #"Removed Columns" = Table.RemoveColumns(#"Extracted Values",{"Addenda"}),
    #"Renamed Columns" = Table.RenameColumns(#"Removed Columns",{{"Custom", "Addenda"}})
in
    #"Renamed Columns"

Once I merge this table with an other one the data stays the way as intended.
But once the new column is expanded, the sorting is not applied.

Sort not appliedAs intended