Reorder Cell Data Using Power Query

Apologies on the delay. I'm looking at your solution since the list I'm trying to alphabetize is emails. The result of your code with the adjustments to fit my spreadsheet is just a list of the names in the list, not alphabetized. Did I miss something?

Here's the adjusted code:

let
    Source = Excel.CurrentWorkbook(){[Name="Duplicate_Link_on_Same_Page"]}[Content],
    custom_delimiter = ", ",
    NewList = Table.AddColumn( Source, "New List", each
        Text.Combine( List.Sort( Text.Split( [ContentOwner] , custom_delimiter ) ), custom_delimiter ),
        Text.Type
    ),
    KeptNewList = Table.SelectColumns( NewList,{"New List"}),
    Class = Table.AddColumn(KeptNewList, "Class", each
        Text.BeforeDelimiter( [New List], custom_delimiter ),
        Text.Type
    ),
    Length = Table.AddColumn( Class, "Length", each
        Text.Length( [New List] ),
        Int64.Type
    ),
    Sorted = Table.Group( Length, {"Class"},
        {"DATA", each
            Table.SelectColumns(
                Table.Sort( _, {{"Length", Order.Ascending}, {"New List", Order.Ascending}} ),
                {"New List"}
            ),
            type table [New List = Text.Type] }
    ),
    Combined = Table.Combine( Sorted[DATA] )
in
    Combined

As a comment, if to change

    /*
    Length = Table.AddColumn( Class, "Length", each
        Text.Length( [New List] ),
        Int64.Type
    ),
    */
    Length = Table.AddColumn(
        Class,
        "Length",
        each List.Count( Text.Split([New List], "," ) ),
        Int64.Type ),

when your solution returns same as Expected Outcome for words as well