This is NOT an error.
This is an EZGenerator demo version limitation.

Once you buy the full registered EZGenerator program all letters will stay as they were entered into the program.
 

• The Trial version will switch the letter 'a' to the letter 'e'
  on every webpage you render.
• Trial version will add a footer on every webpage saying:
  'This page has been generated with the Trial version of EZGenerator'.
• All processed Images will get a 'Trial' Watermark.
  
  

For all demo limitations see the page on this link:
EZGenerator trial limitations