Hockey Skates Sharpening Burnt Blade?

I sharpened my skates at an ice rink that i usually don't go to for sharpening. After the guy sharpened my skates, i noticed there were lines running from edges to edges which was not suppose to happen. There was also a burnt spot on the back of one of the blade. The next day i got it resharpened at the pro store i usually go to and the guy said my skates were poorly sharpened and there were a lot of mistakes on it. After i got it resharpened, the burnt spot was gone and everything was good. On the internet i read that the burnt spot on your blade will make your blade lose an edge REALLY fast. I am wondering if it will actually make you loose the edge really that fast? and should i worry about it since it was on the back of my blade ?