I have run across a very frustrating problem in the drawing canvas & grid in Word. I first noticed the bug in Word 2010. I was unable to find a workaround, so I continued using Word 2007, which does not have the problem. With the release of Word 2013, I was hoping that the bug would get fixed. But it has not.
The bug is cumbersome to describe in words alone. Following below on this web page is a sequence of six screenshots that should explain the bug to anyone who is interested.
I have submitted a question about this bug to the Microsoft Community website. But as far as I can tell, none of the moderators on that site have passed any information about this bug on to Microsoft. Here is a link to the question that I posted: (Link)
(page maintained by Mark Barsamian, last updated February, 2014)