I was having trouble with my 3-way switches in a house I recently purchased. When I went to replace the two 3-way switches I noticed that there were not two travelers but only one. I located the hot wire, and a brown wire connected to the traveler terminal. This brown wire is connected to one traveler post, then the same wire without being cut runs to the second traveler post. I have never seen this and always thought you had to have both travelers for the 3-way lighting to work. Why would this be like this and how does it still work?