Lately I've had difficulties with copying texts that I've written in Word and pasting them into Blogger. I'm no expert, but if you look at the "Edit Html" tab, there is all this extra code that comes with the text when you paste it. Sometimes it works, and sometimes it doesn't. I don't know why.
In the meantime, I found a workaround. If you paste the document into Notepad first and then copy from there to Blogger, you seem to get rid of the code problem when pasting from Word.
Blogger in general is giving me a lot of problems today, particularly with Autosave. I'm not sure what is going on.