I have a Makita SP6000J track saw that's a few years old and has gotten quite a bit of use. I always use it with one of my Makita tracks. One thing I've never been able to figure out is why I get these blade marks on the very first cut, which is usually only 1/4" deep or so. I've made certain that all the knobs are tight and there's no play in the saw sliding on the track. The rest of the cut depths rarely give me any issues. I do 1/2" passes at most in hardwood. This happens with new blades as well. Photo is attached showing the blade marks at the top. It really makes sanding the edges a big pain and I end up with slightly convex ends. Any advice?? Thanks!