I am sorry you are frustrated. I am not a AW2000 tech support personnel pointing a finger at anyone. But I can tell you from working on other forums your assumption that you can copy/paste from Word into an HTML enabled editor without issues is not true.
This week alone on other sites that I work on, I have had to "fix" at least 25 sellers listing who thought it was okay to copy/paste from Word into the HTML enabled editor. And all they got was a bunch of strange invalid characters whose encoding was incorrect. Once the text had been pasted into Notepad, saved and then pasted into the HTML enabled editor the encoding and strange character sets errors were eliminated.
It is not a bug issue with the software applications but rather the extraneous text the human eye cannot see in the background. And once pasted into the HTML enabled editor, it can create strange character sets.
some combinations of letters/characters/numbers create not only RTF issues but also HTML issues. It just works that way.
I only shared what I know causes the issues to help you pinpoint the problem. Not to create any conflict.
I am truly sorry that what I had to offer was not helpful and all it did was frustrate you.