Over-my head

Did you ever think about the words "overview" and "oversight" and their relation to each other? 

"Sight" and "View" have congruous meanings, so one would assume that by simply adding the compound prefix "over", you would also have compound words with similar meanings. However, when combined with "over", these two words become opposing ideas. "Overview" becomes the idea of seeing the whole picture, whereas "Oversight" implies that one has missed the picture.

Odd. 

I love language; so tricksy.