There is a level of flatness that is pretty negative to the new snowboarder. Think of it like riding a bicycle, in order to balance you need to be moving. It's the same with making turns on a snowboard, if your going too slow making turns is going to be hard and the chance of catching an edge is much higher.
Edge control is a big part of not catching edges on flats, which comes with practice. One thing I would suggest is to try and get as much speed as possible when having to traverse on cat-traks, it will reduce the chances of catching an edge and you can zoom past all the kooks blocking the trail.
PowderHound and TreeNinja