title: Style "Comma" doesn't work unless edited manually
body: <p>I have a macros that opens some workbook and puts some data inside it, after putting  a piece of data in a cell it edits its style as <code>.Style = "Comma"</code> (make space separators between numerals). </p>
  
  <p>However, when I open that file I see only some the cells with "Comma" style, while other cells have no separators at all. If I select a cell with no visible separators, but mouse cursor at the formula area and click enter, the style does change to "Comma". </p>
  
  <p>I tried to immitate it with <code>.Cells(i, j).Calculate</code>, but to no avail.</p>
  
  <p>Why doesn't the style change for some of the cells and how to make it change inside macros?</p>
  
  <p>PS I already have an automatic calculation in settings. Changing the style to "Comma" manually (clicking <code>000</code> icon doesn't work either - only works after I put cursor inside the cell's formula and click enter).</p>
  
  <p><strong>EDIT</strong>: I save file as <code>xlsx</code>. The code isn't that important. It consists of <code>Application.Open(filePath)</code> and <code>resultWorkbook.Worksheets("sheet 1").Cells(i, j).Value = someValue</code>. </p>