Although this may look like a text formatter, please do not use any editor that is able to format text, such as Word, to copy and paste your listing from. Always use a plain text editor such as notepad or notepad++ that are not capable of formatting text. If you are forced to use word, either copy the text to a plain text editor first, or use the 'paste as text' button available in hte COAL editor.
If you are using Firefox, the copy, paste and cut buttons may not work correctly. Using ctr+c (copy) or ctr+v (paste) or ctr+x (cut) to overcome this issue. Another option is reset the clipboard proeperties in the browser itself. The workaround can be found here