I have no idea why it happens, but I am 100% sure it is not a coincidence and not a bad file, nor is it bad vinyl. As it happens no matter what file or vinyl I use. I send my file to the cutter, cut it, weed it. Despite some pulls and tears, and bad rounded corners, All goes smoothly and weeds without any struggle.   Now here is the problem I move the blade to the left and cut again, but this time it wont weed!!   I tried upping the pressure but, still, no good results. The first one cuts fine though.  This is very weird. 
I know its not the vinyl because it happens even if I change the vinyl. Its not the file either because it happens with whatever design I use