Errrrrrrrrrrrrrrr...

DNA is a chemical. A complex one. Of course it's going to react with other molecules simliar to it in different ways, which may give the false impression of actual 'intelligence' or foresight behind it. Kind of like watching ants build an anthill. Each individual ant is doing something different, but the end result may almost imply total coordination where there is none.

The sum of many smaller processes.