Files Opening Split up in Mult Programs

This is happening to MANY of my files! I see a file, then click to open and lo and behold I see a list of strangely titled items that appear to be opened up in various programs -- programs like Dreamweaver and others that I never intended them to use. One example is I have a map I saved of a bike trail. I try and open that map and it's in pieces. I see a list that looks like everything has...