Unless you have some mechanical issues with your machine then I would say that this letter was drawn as a polyline.
Most post processors really don't like polylines. What they do is break them down in to short arcs or lines and then create the code for them leaving you with either a crap contour, a very long program or both. When drawing in cad for cutting the best things to use are lines, arcs and circles. Your post processor will easily understand them and create the correct code. I have seen straight lines drawn as polylines broken down into hundreds of lines of code and industrial controllers struggling to run them correctly. You could try saving the dxf as a v12 dxf and then try it again to see if that helps.