This is a walk behind mower. The blade looks like it is on ok condition. No dents or dings in it. Does not look like it hit anything hard. But.....One end seems to be twisted up more than the other. In other words is not symmetrical. I looked up the P/N and it is STEEL WAVE BLADE 1700242ayp. Can anyone confirm if this is intentional and the way it is intended to be made. Thanks.