This is what I have done do "work around" this problem.
It is a design view problem, not code.
Any time you have a grid view that has enough fields to push if off to the right of the visible editing area in design view, this bug will occur. Clicking spans and divs will always highlight that grid, it is so annoying.
You can expand your design view window wide enough to see the entire grid and this problem goes away for the time being. it is extremely annoying but works.
i am sure there are other work arounds but i have not seen anyone else have this problem (most people dont use the design view).