Why Am I Getting Two Different Results From One Constant Source?

Thanks v-chuncz-msft. I tried two different recursive functions. One uses try-otherwise and would theoretically keep refetching the table till it could find and and delete the column named Details, and the other uses if-then-else and would keep refetching the table till it could find the column named Details (if it's there, it's the right table). Both functions gave me the same error: Expression.Error: Evaluation resulted in a stack overflow and cannot continue.

When I substituted Kind for Details, both functions worked fine, because they fetched the second result table (from my original question's examples)...probably on their first attempt...and that second result table has a column named Kind.

Any other ideas?

My function attempts' code are:

let
  Source = Web.Page(Web.Contents("https://MyDomain/path/req_search.cfm?page=AP")),
  GetData = (DataSource) =>
      let 
        DataSet = DataSource{1}[Data],
        RemoveIt = try Table.RemoveColumns(DataSet,{"Details"}) otherwise @GetData(DataSource)
      in
        RemoveIt,        
  ShowData = GetData(Source)
in
  ShowData

...and...

let
  Source = Web.Page(Web.Contents("https://MyDomain/path/req_search.cfm?page=AP")),
  GetData = (DataSource) =>
      let 
        DataSet = DataSource{1}[Data],
        CheckForColumn = if List.Contains(Table.ColumnNames(DataSet), "Details") then 
          Table.RemoveColumns(DataSet,{"Details"}) else @GetData(DataSource) 
      in
        CheckForColumn,
  ShowData = GetData(Source)
in
  ShowData