I merged your posts. We read all the boards so it isn't necessary to post the same question multiple times.
And besides, that causes problems for answering.
I also got an email from you. I responded to that to say YES, we do look at the forum.
I have never run into the issue you are having. I have both CSB and Word 2010 on my system and would be glad to test. Maybe the formatting changes (Word has changed drastically since Trellix was issued).
My first thought is the new DOCX Word file is the new format and may have the compatibility problem. Since we did not have any reports of this issue with Word 2003 or earlier, this may fix your problem:
Open your Word file and FILE SAVE AS and change the format to Word 97-2003 DOC format. You might want to give the DOC file a new name. Close the file and open the DOC older format document and try to copy/paste from that document.
Second thought... FILE SAVE as an RTF (rich text) and this again would remove formatting that CSB would not understand, but would keep basic settings like bolding, font size. Try to paste from the RTF file to CSB.
If you want to give me your WORD file, I will test and see what is causing issue and how to work around it.