I would assume many different reasons, all of which could vary according to specific areas, times of the year, etc.

The experience I had with something like this was a trail that ran along a ridge, once the ridge widened out into a bench - the trail split in a few spots. There was bedding cover as well as some oak stands on this bench and there were trails that split and went towards those areas. Those same trails then either converged again down the ridge or just faded away into complete nothingness on the backsides of the cover and food sources. It was a pretty nice little spot and I took a couple deer during consecutive rifle seasons (this is before I started to bowhunt) but then we lost permission for that piece of property (friends moved away)