Was it a hand wax or belt wax?
If it was a quickie belt wax and you were riding all day particularly if on man made snow I could see this happening. Hand waxing penetrates the base better and lasts a little longer, so if it was a proper hand wax I'd be a bit surprised to have it worn off so soon.
This was a hot hand wax, done myself. I too was surprised it looks like this so soon.