Ahhh was definitely the carpet! Don't know why I didn't think of that. I suppose I thought the mat was firm enough on it's own. Guess you can tell how new I am to this !
I think it's also a better angle cutting standing up because the pressure just from standing down works with the blade.
I might give the harbor freight blades a try as well. I don't know why but I've got this obsession with wanting really sharp blades!