Exporting spreadsheet makes some rows bigger

Exporting spreadsheet makes some rows bigger

I have a spreadsheet in Zoho which looks fine, but when I export it to a .ods file it makes the height of every 20th row bigger.  I thought it might be due to wrapping, but nothing in the cells would account for this.

I have also tested exporting it as a .xls file and I get the same results.  If I export as .csv I can only get one sheet at a time, but the height is the correct size.

Is this a known issue? I tried to attach the file as a .ods but it won't let me here.  So, here it is as a .xls file.  It should have the same results as a .ods file.