Split multiple row to multiple row by line break based on character conditions

Here you go. 

let
    Source = Excel.Workbook(File.Contents("C:\Users\Ed Hansberry\OneDrive\Downloads\split_test.xlsx"), null, true),
    test_Sheet = Source{[Item="test",Kind="Sheet"]}[Data],
    #"Promoted Headers" = Table.PromoteHeaders(test_Sheet, [PromoteAllScalars=true]),
    #"Filtered Rows" = Table.SelectRows(#"Promoted Headers", each ([checklist] <> null)),
    #"Grouped Rows" = Table.Group(#"Filtered Rows", {"num", "checklist"}, {{"All Rows", each _, type table [num=number, checklist=text, sop=text, expected=text]}}),
    #"Split Column by Delimiter" = Table.ExpandListColumn(Table.TransformColumns(#"Grouped Rows", {{"checklist", Splitter.SplitTextByDelimiter("#(lf)", QuoteStyle.Csv), let itemType = (type nullable text) meta [Serialized.Text = true] in type {itemType}}}), "checklist"),
    #"Filtered Rows1" = Table.SelectRows(#"Split Column by Delimiter", each ([checklist] <> "")),
    #"Added First Column" = 
        Table.AddColumn(
            #"Filtered Rows1", 
            "First Column",
            each 
                let
                    varGroupText = Text.Start([checklist], 1)
                in
                Text.Combine(
                    Table.SelectRows(
                        Table.FromList(
                            Text.Split([All Rows][sop]{0}, "#(lf)"),
                            Splitter.SplitByNothing()
                        ),
                        each Text.Start([Column1],1) = varGroupText
                    )[Column1],
                "#(lf)"
                )
            ),
    #"Added Second Column" = 
        Table.AddColumn(
            #"Added First Column", 
            "Second Column",
            each 
                let
                    varGroupText = Text.Start([checklist], 1)
                in
                Text.Combine(
                    Table.SelectRows(
                        Table.FromList(
                            Text.Split([All Rows][expected]{0}, "#(lf)"),
                            Splitter.SplitByNothing()
                        ),
                        each Text.Start([Column1],1) = varGroupText
                    )[Column1],
                "#(lf)"
                )
            ),
    #"Removed Other Columns" = Table.SelectColumns(#"Added Second Column",{"num", "checklist", "First Column", "Second Column"})
in
    #"Removed Other Columns"

Again, change the source to your file. THe key was adding 

Splitter.SplitByNothing()

to the Table.FromList functions in each column. 

Apparently the unusual ASCII characters was causing Power Query to split more than you wanted, so this forces no splitting within a Table.FromList. If ImkeF knows more I'd love her wisdom on this usage.

You need to be 100% sure nothing is being dropped. I cannot read that language so it isn't efficient for me to do character comparisons.